Martha biked quite a few days last month. she biked 25 miles the first day and 15 miles each day after that. let m represent the number of days after the first day. which expression shows the total distance martha biked last month? a. 15m + 25 b. (15 + 25)m c. 25m + 15 d. 15 + 25 + m

Which of the following is not a subset of {1,2,3}?

If value of cos330° is √3/2 then find tan165°.

If p(x) is the total value of the production when there are x workers in a plant, then the average productivity of the workforce at the plant is a(x) = p(x) x . (a) find a'(x). a'(x) = xp'(x) − p(x) x a'(x) = xp'(x) − p(x) x2 a'(x) = p'(x) − p(x) x a'(x) = xp'(x) − p'(x) x2 a'(x) = p'(x) − xp(x) x2 why does the company want to hire more workers if a'(x) > 0? a'(x) > 0 ⇒ a(x) is ; that is, the average productivity as the size of the workforce increases. (b) if p'(x) is greater than the average productivity, which of the following must be true? p'(x) − xp(x) > 0 p'(x) − xp(x) < 0 xp'(x) − p'(x) > 0 xp'(x) − p(x) < 0 xp'(x) − p(x) > 0