A study of college freshman study habits found that the time (in hours) that college freshman use to study each week is approximately normally distributed with a mean of 7.2 hours and a standard deviation of 5.3. a) What is the probability that a randomly chosen freshman studies more than twice the average number of hours

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

x-150=475   x=625

step-by-step explanation:

if the bike after the sale ($150) is $475 then just simply add 150 to 475.

25.3

step-by-step explanation:

1st step

add 3+6

=9

multipy 9*3

=37

3. 8,935,200 minutes

4. 227,040 feet