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nalin [4]
3 years ago
11

The number of hours per week that high school seniors spend on computers is normally distributed, with a mean of 5 hours and a s

tandard deviation of 2 hours. 70 students are chosen at random. let y represent the mean number of hours spent on the computer for this group. find the probability that y is between 5.1 and 5.7
Mathematics
1 answer:
deff fn [24]3 years ago
8 0
5.4 dawg
if i did it the way i think it asks 
hope it helps!!
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What is the 38th term of 459,450,441,..
galina1969 [7]

Answer:

The 38th term of 459,450,441,.. will be:

a_{13}=351

Step-by-step explanation:

Given the sequence

459,450,441,..

An arithmetic sequence has a constant difference 'd' and is defined by

a_n=a_1+\left(n-1\right)d

computing the differences of all the adjacent terms

450-459=-9,\:\quad \:441-450=-9

so

d=-9

The first element of the sequence is

a_1=459

so the nth term will be

a_n=-9\left(n-1\right)+459

a_n=-9n+468

Putting n=38 to find the 38th term

a_n=-9n+468

a_{13}=-9\left(13\right)+468

a_{13}=-117+468

a_{13}=351

Therefore, the 38th term of 459,450,441,.. will be:

a_{13}=351

3 0
3 years ago
micchel and jennefer each worked 25 hours last week. micchel eared $10 per hour jennifer earned $12 per hour how much more did j
Mila [183]

Answer:Jennifer earn 50$ more than micchel

Step-by-step explanation:

6 0
3 years ago
List all sets that -1/3 belongs to.
Vikki [24]

Answer:

dfffffffff

Step-by-step explanation:

xcdsw23456iu76

5 0
3 years ago
Find the value of the expression: −0.5(7b−12a)−(8.4a−14b) if a=−10; b=−6.
ELEN [110]

Replace a and b in the equation with their values given:

-0.5(7(-6)-12(-10)-(8.4(-10)-14(-6))

Multiply within the parentheses

-0.5(-42 + 120) -(-84 + 84)

Add inside the parenthesis:

-0.5(78)-0

Multiply:

-.05 x 78 = -39

The answer is -39

3 0
3 years ago
Name a radius not drawn as part of a diameter ​
Ksenya-84 [330]

Answer:

Radius CP

Step-by-step explanation:

Line AB best shows the diameter. Lines AP, PB, and CP all show the radius. However, only line CP is not drawn as part of the diameter.

6 0
3 years ago
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