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patriot [66]
3 years ago
10

6 10/12 - 1 11/12

Mathematics
1 answer:
CaHeK987 [17]3 years ago
5 0
Correct answer is B. 4 11/12
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The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard devi
son4ous [18]

Answer:

Step-by-step explanation:

Since the length of time taken on the SAT for a group of students is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - u)/s

Where

x = length of time

u = mean time

s = standard deviation

From the information given,

u = 2.5 hours

s = 0.25 hours

We want to find the probability that the sample mean is between two hours and three hours.. It is expressed as

P(2 lesser than or equal to x lesser than or equal to 3)

For x = 2,

z = (2 - 2.5)/0.25 = - 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.02275

For x = 3,

z = (3 - 2.5)/0.25 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.97725

P(2 lesser than or equal to x lesser than or equal to 3)

= 0.97725 - 0.02275 = 0.9545

6 0
3 years ago
PLEASE HELP
Vladimir [108]

Answer:

5.5 inches

Step-by-step explanation:

1) the formula to find the area of a square is l^2= area and l=length

in this case we already know the area but not the length

so we have to find the square root of 30 as the opposite operation needs to be used to find the missing number

so

√30= 5.47

5.47 rounded= 5.5

the length of one side is 5.5 in

5 0
3 years ago
What number should be added to both sides of the equation to complete the square?<br> x² - 6x=5
Neko [114]

Answer:

x= ±√14+3

Step-by-step explanation:

.......................................................................................

8 0
3 years ago
Read 2 more answers
Consider 4x +12 &lt; 28. which value of x makes the given inquality TRUE? A) 3 B) 6 C) 7 D) 10
Pepsi [2]

Answer:

A

Step-by-step explanation:

4(3)+12=24, which is less than 28, so the inequality would be true

7 0
3 years ago
Read 2 more answers
246000 in scientific notation
atroni [7]

Answer:

2.46 x 10⁵

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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