Do the functions have the same concavity?
f(x)=-x^2-15x

A. Yes f and g both concave down

B. Yes, f and g both concave up

C. No, f is concave up and g is concave down

D. No, f is concave down and g is concave up

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Kerion has a beaded necklace business. she can make 12 necklaces is 2 hours. how long will it take her to make 9 necklaces?

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation