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3 years ago

A normal distribution of data has a mean of 15 and a standard deviation of 4. How many standard deviations from the

Mathematics

2 answers:

shepuryov [24]3 years ago

4 0

C. 2.5 is the correct answer to this question

snow_lady [41]3 years ago

3 0

Answer:

its 2.5 i hope this helps!

Step-by-step explanation:

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Diane's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Diane

Shalnov [3]

4.05x+5.25(149-x)=710.25
Solve for x
X=60 ........4.05

149-60=89.....5.25

5 0

4 years ago

Solve for b2 in A = 1/2 h ( b1 + b2 ), if A = 16, h = 4, and b1 = 3.

Katarina [22]

Hello from MrBillDoesMath!

Answer:

b2 = 5

Discussion:

A = 1/2 h (b1 + b2) .

Substituting A = 16, h = 4, and b1=3 in the above formula gives:

16 = (1/2) (4)( 3 + b2) => (as (1/2)4 = 2) )

16 = 2 ( 3 + b2) => (divide both sides by 2)

8 = (3 + b2) => (subtract 3 from both sides)

8-3 = b2 =>

5 = b2

Check Area formula:

Does A = 16 = (1/2)(4)(3+5) ?

Does 16 = (1/2) (4)(8) ?

Does 16 = (1/2)(32) ? Yes it does so our calculation for b2 is correct

Thank you,

MrB

7 0

3 years ago

What is the equation of a vertical ellipse with a major axis= 20 and a minor axis = 14?

Sunny_sXe [5.5K]

$\bold{\text{Answer: b.}\quad \dfrac{y^2}{100}+\dfrac{x^2}{49}=1}$

<u>Step-by-step explanation:</u>

The ellipse is vertical so y has the biggest radius.

Major axis (y) = 20 so the y-radius is 20/2 = 10

Minor axis (x) = 14 so the x-radius is 14/2 = 7

The equation of an ellipse is: $\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2}=1$ where

(h, k) is the center of the ellipse
a is the x-radius
b is the y-radius

Given: a = 7, b = 10

Assume: (h, k) = (0, 0)

$\dfrac{(x-0)^2}{7^2}+\dfrac{(y-0)^2}{10^2}=1\\\\\\\dfrac{x^2}{49}+\dfrac{y^2}{100}=1\\\\\\\longrightarrow \dfrac{y^2}{100}+\dfrac{x^2}{49}=1$

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3 years ago

Each of the options below describes a relationship that you need to graph in a coordinate plane. which of the options will have

Whitepunk [10]

You correct answer would be a.

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3 years ago

Divide to Find Equivalent Ratios

Brilliant_brown [7]

Answer:

4 are equivalent to 3 feet with 6 feet 72 inches.

Step-by-step explanation:

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3 years ago