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Tasya [4]
2 years ago
15

The amount of Jen’s monthly phone bill is normally distributed with a mean of $75 and a standard deviation of $8. What percentag

e of her phone bills are between $51 and $99?
A. 99.7%
B. 95%
C. 99.99%
D. 68%
Mathematics
1 answer:
nikklg [1K]2 years ago
8 0
Answer:a is the answer
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What kind of number is -5? Is it rational or something like that?
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The number -5 is anything but natural number.
It is an integer (Z) ,a rational number (Q) and a real number (R) .

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Which of the following is an equation of the line that passes through the point (2, 2) and is parallel to the graph of the equat
pickupchik [31]

Answer:

B

Step-by-step explanation:

The equation of a line in slope- intercept form is

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y = 3x - 1 ← is in slope- intercept form

with slope m = 3

Parallel lines have equal slopes, thus

y = 3x + c ← is the partial equation of the parallel line

To find c substitute (2, 2) into the partial equation

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4 0
3 years ago
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Find the probability that when a couple has four ​children, at least one of them is a girl. ​(Assume that boys and girls are equ
AveGali [126]

Answer:

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Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

We have the following sample space

In which b means boy, g means girl

b - b - b - b

b - b - b - g

b - b - g - b

b - b - g - g

b - g - b - b

b - g - b - g

b - g - g - b

b - g - g - g

g - b - b - b

g - b - b - g

g - b - g - b

g - b - g - g

g - g - b - b

g - g - b - g

g - g - g - b

g - g - g - g

Total outcomes

There are 16 total outcomes(size of the sample space)

Desired outcomes

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So the number of desired outcomes is 15.

Probability:

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0.9375 = 93.75% probability that at least one of the four children is a girl.

7 0
3 years ago
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2 / 1 = 2  OR  2 / 2 = 1  These numbers are prime numbers because their divisors
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