Sarah hears the siren of an ambulance that is moving toward her. If the actual frequency of the siren is 2000 hertz; which frequency washeard by Sarah?
OA. 1900
B. 2000
C. 1000
D. 2100

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

You win the lottery and decide to impress your friends by exhibiting a million-dollar cube of gold. at the time, gold is selling for $ 426.60 per troy ounce, and 1.0000 troy ounce equals 31.1035 g. -how tall would your million-dollar cube be? en cm

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)