Three-year-old boys in the United States have a mean height of 38 inches and a standard deviation of 2 inches, and 10-year-old girls have a mean height of 54.5 inches and a standard deviation of 2.5 inches.
Mrs. Davis has two children: a 3-year-old boy 43 inches tall and a 10-year-old girl 57 inches tall.
Which of Mrs. Davis' children is more unusually tall for his
or her age and gender? Explain, showing any calculations you perform.

Answer:

567

Step-by-step explanation:

n

Answer:

half-life ≈ 2.74

Step-by-step explanation:

One formula we can use for half life is,

N(t) = No * (1/2)^(t / t_1/2), where

We already know that N(t) = 28, No = 128, the base is 1/2, and t is 6.  Thus, we must solve for t_1/2 using the following equation:

28 = 128 * (1/2) ^ (6 / t_1/2)

(28 = 128 * (1/2) ^ (6 / t_1/2) / 128

0.21875 = (1/2) ^ (6 / t_1/2)

ln (0.21875) = ln (1/2 ^ (6 / t_1/2))

ln (0.21875) = 6 / t_1/2 * ln (1/2)

(ln ( 0.21875) = 6 / t_1/2 * ln (1/2)) / ln (1/2)

ln (0.21875) / ln (1/2) = 6 / t_1/2

[tex]\frac{ln(0.21875)}{ln(1/2)}=\frac{6}{t_{1/2} }\\ \\ t_{1/2}*ln(0.21875)=6*ln(1/2)[/tex]

(t_1/2 * ln (0.21875) = 6 * ln (1/2)) / ln (0.21875)

t_1/2 = (6 * ln (1/2) / ln (0.21875)

t_1/2 = 2.736420983 hours

t_1/2 = 2.74 hours

The only real difference between the longer number and the rounded number is that the longer answer gives a more exact answer when you plug it in, but the rounded answer seems to make more sense to write:

Result when plugging in exact answer for t_1/2:

N (2.736420983) = 128 (1/2) ^ (6 / 2.736420983) = 28

Result when plugging in rounded answer for t_1/2:

N (2.74) = 128 (1/2) ^ (6 / 2.74) = 28.05564116

Answer:

Yes, the function f(x) = (x + 2)² is one-to-one.

Answer: x= 75.52 deg

Step-by-step explanation:

1) cos x = adjacent/hypotenuse

  cos x = 2 / 8

  x = cos^-1(2/8)

  x= 75.52 deg

Answer:

What is Saving?

Saving means to keep money aside, not using it for any purpose at all, until in reach of desired goal. While some save for emergencies, others save for family or materials.

Example: My father is saving for a really nice vacation trip to Canada. He needs enough money to pay for gas, the hotel rooms, food and other necessities.

What is Investing?

Investing is the practice of putting interest into something. Investing involves paying for something in increments while also having flowy income. You could invest in almost anything.

Example: My mother and I are investing into a large, family-sized, RV. We are making custom arrangements and changes while we are still living in, and keeping our tiny-home.

The probability of selecting a 2 given that a blue disk is selected is 1/8, or 0.125.

1. Let's calculate the probability of selecting a blue disk

We can select a blue disk with number 2, 6 or 8 out of a total of 8 disks, it means that the probability of selecting a blue disk is = 3/8

2. Let's calculate the probability of selecting the blue disk labeled with number 2 =

We can select the blue disk labeled with number 2 out of three blue disks, it means that the probability of selecting the blue disk labeled with number 2 is = 1 /3

3. These are dependent events because the fact that we select the disk labeled with number 2, depends on selecting a blue disk before, thus:

Probability of selecting a 2 given that a blue disk is selected =

3/8 x  1/3 = 3/24 = 1/8

Thus,it is correct to state that the probability of selecting a 2 given that a blue disk is selected is 1/8, or 0.125.

Learn more about probability:
https://brainly.com/question/30694293

#SPJ1

Full Question:

See attached image.

Answer:

Step-by-step explanation:

Formula for trapezoid:

A=[tex]\frac{1}{2}[/tex](b1 + b2)h

1.  b1=5    b2=23  h=12

A=1/2(5+23)12

=168

The statement can be written as the inequality:

x ≥ 12

We know that x is at least 12, so x can be equal to 12, or larger. We want to write that as an inequality, and it can be written as:

x ≥ 12

The symbol:

"≥"

Means that the thing in the left is larger or equal than the thing in the right, so that inequlity represents the given statement.

Learn moer aboute inequalities:

https://brainly.com/question/24372553

#SPJ1

Check the picture below.

[tex]~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{2}~,~\stackrel{y_1}{1})\qquad (\stackrel{x_2}{5}~,~\stackrel{y_2}{7})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ d=\sqrt{(~~5 - 2~~)^2 + (~~7 - 1~~)^2} \implies d=\sqrt{( 3 )^2 + ( 6 )^2} \\\\\\ d=\sqrt{ 9 + 36 } \implies d=\sqrt{ 45 }\implies d\approx 6.7[/tex]

The solution of given trigonometric Problem by using formula of sine , cosine , tangent is part A 1)cos-1(12/13) 2)∅=cos-1(2/3) 3)sin-1(4/13)

part B 1)13.75 unit 2) 8.112 unit 3) 5.5 unit

Trigonometry is a branch of mathematics that deals with the study of relationships between angles and sides of triangles. It primarily focuses on the properties and functions of angles, and how they can be used to calculate the measurements of sides and angles in a triangle.

Part A

1)In the given ΔACB  Right angle at ∠C

for find ∅ we use

          cos∅=B/H

          cos∅=AC/AB

          cos∅=12/13

           ∅=cos-1(12/13)

2)      cos∅= AC/AB

          ∅=cos-1(6/9)

           ∅=cos-1(2/3)

3)       sin∅=CB/AC

             ∅=sin-1(4/13)

Part-B

      1)   cos37°=11/x

              4/5=11/x

                x=55/4

                  x=13.75 unit

2)         tan32°=x/13

          0.624=x/13

          x= 8.112 unit

3)       cos 60°=x/11

         1/2= x/11

           x=11/2

            x=5.5 unit

To know more about trigonometric Visit:

brainly.com/question/29156330

#SPJ1

The value of x is 31/64 or 0.484375 and the value of 61/64 is given by adding the value of 29/64 and 31/64 which is 0.9375.

To convert a fraction to a decimal, you need to divide the top number by the bottom number. Here are the steps to follow:

1. Fraction should be written as numerator (top) divided by denominator (bottom).

2. Divide the numerator by the denominator using long division or a calculator.

3. Keep dividing until you get a decimal that terminates or repeats.

a) The given equation is

       [tex]\frac{61}{64} = \frac{29}{64} + x[/tex]

       [tex]\frac{61}{64} - \frac{29}{64} = x[/tex]

       [tex]x = \frac{31}{64}[/tex]

b) Now 31/64 = 0.484375 and given that 29/64 = 0.453125

Hence from the equation 61/64 = 29/64 + 31/64 = 0.453125 + 0.484375

= 0.9375.

To know more about fractions visit:

brainly.com/question/8482939

#SPJ1

Answer:

To find the equation of the line containing the segment DE, we can use the coordinates of D and E to find the slope:

slope = (change in y) / (change in x) = (0 - 3) / (4 - 2) = -3/2

We can use the point-slope form of the equation of a line, using either D or E as the point:

y - 3 = (-3/2)(x - 2)

Simplifying this equation, we get:

y = (-3/2)x + 6

Similarly, to find the equation of the line containing the segment EF, we can find the slope using the coordinates of E and F:

slope = (change in y) / (change in x) = (-2 - 0) / (1 - 4) = 2/3

Using either E or F as the point, we can write the equation in point-slope form:

y - 0 = (2/3)(x - 4)

Simplifying, we get:

y = (2/3)x - (8/3)

To find the equation of the line containing the segment TV, we can find the slope using the coordinates of T and V:

slope = (change in y) / (change in x) = (0 - 3) / (-2 - 0) = 3/2

Using either T or V as the point, we can write the equation in point-slope form:

y - 3 = (3/2)(x - 0)

Simplifying, we get:

y = (3/2)x + 3

Finally, to find the equation of the line containing the segment VW, we can find the slope using the coordinates of V and W:

slope = (change in y) / (change in x) = (-2 - 0) / (1 - (-2)) = -2/3

Using either V or W as the point, we can write the equation in point-slope form:

y - 0 = (-2/3)(x - (-2))

Simplifying, we get:

y = (-2/3)x + (4/3)

Answer:

are reflection across the y-axis and translation 2 units right.

Step-by-step explanation:

The theoretical probability of each section is 1/8, since there are 8 equal-sized sections on the spinner. To find the theoretical frequency, we multiply the theoretical probability by the total number of spins:

Theoretical frequency = (1/8) x 450 = 56.25

We can then calculate the experimental probability for each section by dividing the frequency by the total number of spins:

Experimental probability = Frequency/Total number of spins

Using this formula, we can calculate the experimental probabilities for each section:

Part 1: Experimental probability = 58/450 ≈ 0.129

Part 2: Experimental probability = 52/450 ≈ 0.116

Part 3: Experimental probability = 39/450 ≈ 0.087

Part 4: Experimental probability = 77/450 ≈ 0.171

Part 5: Experimental probability = 50/450 ≈ 0.111

Part 6: Experimental probability = 43/450 ≈ 0.096

Part 7: Experimental probability = 60/450 ≈ 0.133

Part 8: Experimental probability = 71/450 ≈ 0.158

To find the number with the greatest difference between the theoretical and experimental probability, we can calculate the difference between the two probabilities for each section:

Part 1: |0.125 - 0.129| = 0.004

Part 2: |0.125 - 0.116| = 0.009

Part 3: |0.125 - 0.087| = 0.038

Part 4: |0.125 - 0.171| = 0.046

Part 5: |0.125 - 0.111| = 0.014

Part 6: |0.125 - 0.096| = 0.029

Part 7: |0.125 - 0.133| = 0.008

Part 8: |0.125 - 0.158| = 0.033

As we can see, the greatest difference between the theoretical and experimental probability is for Part 4 with a difference of 0.046. This indicates that the experimental frequency for Part 4 is significantly different from the theoretical frequency, which may suggest that the spinner is biased towards that section.

Answer:

the answer is (HK) Because gj is the only other line that goes across the circle but it is not an option.

Answer:

a₂₆ = 248

Step-by-step explanation:

to find the 26th term substitute n = 26 into the explicit formula

a₂₆ = 14 + 9(26) = 14 + 234 = 248

The answers are given below:

A conditional statement is a form of logical statement that consists of two parts: a conclusion and an antecedent (sometimes known as a "if-clause")  

If p, then q is a common way to represent the link between the hypothesis and the conclusion, where p stands for the hypothesis and q for the conclusion.

Therefore, the correct options are:

The statement can be written as a biconditional: Two angles are complementary if and only if the sum of their measures is 90.

The converse of the statement is false.

A counter-example to prove the converse is false is: a Linear pair of angles are not complementary, they add up to 180.

Read more about angles here:

https://brainly.com/question/25716982

#SPJ1

Answer:

The constant of proportionality in the equation 2y = 2x is 1.

Note that this equation is actually the same as y = x, which is a linear equation with a slope of 1 and a y-intercept of 0. In this case, the coefficient of x (which is 2) is not the constant of proportionality because it does not represent a proportional relationship between x and y. Instead, the constant of proportionality is the ratio of the change in y to the change in x, which is 1.

Answer: I think the answer is $229.5, or $259.5 since it says he has to pay $30

Step-by-step explanation: Just multiply 270 by the percent as a decimal. 85% is equal to 0.85 and that multiplied by 270 is 229.5

The solution to the inequality, 4 - 2x ≥ 10, is x ≤ -3.

The graph is shown below.

To graph the solution to the inequality given, we have to first of all solve for the possible values of x in the given inequality.

Given the inequality,  4 - 2x ≥ 10, we have:

4 - 2x ≥ 10

Subtract 4 from both sides:

4 - 4 - 2x ≥ 10 - 4

-2x ≥ 6

Divide both sides by -2:

-2x/-2 ≤ 6/-2

x ≤ -3

This means that the values of x are equal to -3 or less than -3.

The graph below shows the solution.

Learn more about the graph of the solution of inequality on:

https://brainly.com/question/24372553

#SPJ1

The crucial t-value is determined to be 1.734 using a t-table with 19 degrees of freedom and a significance threshold of 0.05 for a one-tailed test.

A type of statistical hypothesis known as a null hypothesis claims that a certain collection of observations has no statistical significance. The viability of hypotheses is evaluated using sample data. known as "zero" at times and represented by the letter H0. The assumption made by researchers is that there is a relationship between the variables. The null hypothesis, on the other hand, asserts that such a connection does not exist. Although it might not seem significant, the null hypothesis is an important part of research.

We may run a one-tailed t-test for the standard deviation to test the hypothesis that the standard deviation of heights of major-league baseball players is less than 2.7 inches.

The following formula may be used to get the sample standard deviation of the players' heights among the 20 chosen at random:

where n is[tex]s = 1/(n-1) * \sum(x' - x)^2 = 1/(20-1) * (1.83-1.755)^2 + ... + (1.9-1.755)^2 = 0.0414[/tex] the sample size, xi is the player's height at position i, and x is the average player's height in the sample.

The test statistic may then be calculated as follows:

[tex]t = (n-1) * s^2 / \sigma ^2 = 19 * 0.0414^2 / 2.7^2 = 0.197[/tex]

The crucial t-value is determined to be 1.734 using a t-table with 19 degrees of freedom and a significance threshold of 0.05 for a one-tailed test.

To know more about null hypothesis visit

https://brainly.com/question/28920252

#SPJ1

The Ice Cream container will hold 1.2 liters of Ice Cream.

The Volume of Ice Cream can be calculated by Cubical Volume Equation V=l*b*h _______(1). We Have the data : Length = 0.2 meters, Width = 0.1 meters, Height = 0.06 meters

Now Having the Values of Length, Height & Width. Putting these Values in The Equation (1),

Volume = 0.2*0.1*0.06 m³

Volume = 0.0012 m³

We have got the Volume of Ice Cream that can be contained by the Container in m³. To Convert into Liters, we have equation 1 m³=1000 Liters. According to this, The Volume of Ice Cream Contained in The Container will be 1.2 Liters.

To Learn more regarding Volume Calculation :

https://brainly.com/question/11168779

https://brainly.com/question/15672543

Answer:

x = -3

Step-by-step explanation:

We know that,

[tex]\sf a^x*a^y=a^{x+y}\\\\(a^x)^y=a^{xy}\\\\\frac{a^x}{a^y} =a^{(x-y)}[/tex]

Accordingly,

[tex]\sf \frac{(7^{10})^2}{7^4} =\frac{7^9*7^{10}}{7^x} \\\\\sf \frac{7^{10*2}}{7^4} =\frac{7^{9+10}}{7^x} \\\\\sf \frac{7^{20}}{7^4} =\frac{7^{19}}{7^x}\\\\7^{20-4}=7^{(19-x)}\\\\16=19-x\\\\16-19=x\\\\-3 =x[/tex]

The amount of money in the account after 17 years, to the nearest dollar, would be $76,956.

What is the formula for the future value?

The formula for the future value of an investment with continuous compounding is [tex]A = Pe^{(rt)}[/tex] where A is the future value, P is the principal (initial investment), e is the mathematical constant approximately equal to 2.71828, r is the annual interest rate as a decimal, and t is the number of years.

Putting in the given values,

[tex]A = 52000 \times e^{(0.021 \times 17) }\\ A ≈ 76,956.18[/tex]

Therefore, the amount of money in the account after 17 years, to the nearest dollar, would be $76,956.

Learn more about future value here,

https://brainly.com/question/31366709

#SPJ1

Answer:

If the common ratio is 0.6, then the percent change is a decrease of 40%.

If the common ratio is 0.6 then the percent change is 40%

percentage, a relative value indicating hundredth parts of any quantity.

The percent change for a geometric sequence with common ratio r is given by the formula:

percent change = (r - 1) × 100%

In this case, the common ratio is 0.6, so the percent change is:

percent change = (0.6 - 1) × 100% = -0.4 × 100% = -40%

The percent change is negative, which means the sequence is decreasing.

Hence, If the common ratio is 0.6 then the percent change is 40%

To learn more on Percentage click:

https://brainly.com/question/24159063

#SPJ2

y = x - 4 is  the equation of the line in slope-intercept form.

How do you interpret a slope-intercept form?

The data provided by that form can be used to graph a linear equation in slope-intercept form. As an illustration, the equation y=2x+3 indicates that the line's slope is 2 and that its y-intercept is located at (0,3). This reveals the single point at which the line passes as well as the direction in which we should draw the full line after that.

Point from graph = (2, -2 )

                slope (m) = y/x

                                = -2/2

                                = 1

slope-intercept form ⇒ y = mx + c    

                                        -2 = 1 * 2 + c

                                          - 2 = 2 + c

                                               c = -4

 slope-intercept form ⇒ y = x - 4

Learn more about slope-intercept form

brainly.com/question/29146348

#SPJ1

The value of x for which sin(x+16)°=cos(2x+14)° is 20

Trigonometry is a branch of mathematics concerned with relationships between angles and ratios of lengths

The given equation says:

sin(x+16)°=cos(2x+14)°

Remember that sin(90-x) = cos x

Applying this formula we have

So comparing we have,

sin(x+16)°=cos(2x+14)°

90 - (x + 16) = 2x +14

distributing - over the bracket

90 -x - 16 = 2x + 14

bringing like terms together,

90-16-14 = 2x +x

60 = 3x

Dividing both sides by 3,

x =20

Therefore the value of sin(x+16)°=cos(2x+14)° is 20⁰

Learn more about trigonometrical equation on https://brainly.com/question/30710281

#SPJ1

The solution of compound interest problem using formula of amount  is

Anna have$2,734 more money than  Hudson.

Compound interest is a type of interest in which the interest gained is added to the principal sum before the interest for the subsequent period is calculated using the updated total sum. In other words, in addition to the initial principal, the accumulated interest from prior periods is also taken into account for calculating interest. As a result, as time passes, the interest earned increases, increasing the total amount earned or due. Savings accounts, loans, and investments frequently use compound interest.

For continuous compounding, the formula is:

A = Pe^(rt)

Where:

A = the amount after t years

P = the principal amount

r = the annual interest rate (as a decimal)

t = the time in years

For daily compounding, the formula is:

A = P(1 + r/n)^(nt)

Where:

A = the amount after t years

P = the principal amount

r = the annual interest rate (as a decimal)

n = the number of times compounded per year

t = the time in years

Using these formulas, we can calculate the amount that Anna and Hudson will have after 10 years, and then find the difference between them.

For Anna's investment:

r = 8.5% = 0.085 (as a decimal)

t = 10 years

P = $69,000

A = Pe^(rt) = 69000 * e^(0.085*10) = $156,794.63

For Hudson's investment:

r = 8 3/8% = 8.375% = 0.08375 (as a decimal)

n = 365 (daily compounding)

t = 10 years

P = $69,000

A = P(1 + r/n)^(nt) = 69000(1 + 0.08375/365)^(365*10) = $154,060.52

Therefore, the difference between the two amounts is:

$156,794.63 - $154,060.52 = $2,734.11

So Anna will have approximately $2,734 more in her account than Hudson after 10 years.

To know more about compound interest Visit:

brainly.com/question/14295570

#SPJ1

x = -1 is a root of the polynomial only if C = 3.

We want to have x = -1 as a root of the polynomial, then we just need to solve:

f(-1) = 0

this is:

2(-1)³ - 4(-1)² - 3(-1) + C  =0

-2 - 4 + 3 + C = 0

-3 + C = 0

C = 3

Tha must be the value of C.

Learn more about polynomial at.

https://brainly.com/question/4142886

#SPJ1

The angle 9pi/4 is a positive coterminal angle of pi/4.

What is a coterminal angle?

Two angles are called coterminal if they have the same initial and terminal sides. In other words, two angles are coterminal if they differ by a multiple of 360 degrees or 2π radians. For example, 30 degrees and 390 degrees are coterminal angles, as are π/4 and 9π/4.

A coterminal angle of pi/4 can be found by adding or subtracting any multiple of 2pi until we get an angle between 0 and 2pi that is equivalent to pi/4.

One way to find a positive coterminal angle is to add 2pi:

pi/4 + 2pi = 9pi/4

So, The angle 9pi/4 is a positive coterminal angle of pi/4.

Learn more about coterminal angle, by the following link.

https://brainly.com/question/23093580

#SPJ1

Answer:

sinA =9/41. CosA=40/41

Step-by-step explanation:

in right triangles, the sine, cosine and tangent represent ratios of the sides of a triangle. Sine of an angle is the ratio of the side opposite the angle divided by the hypotenuse and the cosine of the angle is side adjacent (touching) the angle divided by the hypotenuse.

The value of Sin A = 9 / 41 and the value of Cos A = ( 40 / 41).

The branch of mathematics sets up a relationship between the sides and the angles of the right-angle triangle is termed trigonometry.

here, we have,

The values of the angels will be calculated by using the trigonometry property.

Sin A = Perpendicular / Hypotenuse

Sin A = 9 /41

Cos A = Base / Hypotenuse

Cos A =  40 / 41

Therefore the value of Sin A = 9 / 41 and the value of Cos A = ( 40 / 41).

To know more about Trigonometry follow

brainly.com/question/24349828

#SPJ5