What is the probability a random sample of size 2020 will have a mean gestation period within 99 days of the mean?

Me with this one question, and i'll upvote the brainliest answer

How do i put 3(x+7) in distributive property

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x