10.Research indicates that the average adult sleeps M = 360 min a night with SD = 90 min, which forms a normal distribution. What is the probability of randomly selecting an adult who sleeps between 360 min and 500min a night? Answer:

8 help thanks

0.866 not co

Please explain

please explain

7) Solve this question, no handwritten, only typing

A mass m is on a frictionless incline of height H, angle , as shown in the picture. The mass slides down the incline. (a) At the bottom of the incline, what is the speed of the mass? (b) If instead of being frictionless, there is a coefficient of kinetic friction, uk, between the incline and the block, at the bottom of the incline, what is the speed of the mass now?

6) To solve the sub-part (B) only

9. Please explain the answer.

4.plz answer the question correctly asap