If an object moves along the y-axis (marked in feet) so that its position at time x (in seconds) is given by
f(x)= 255x-17x^2 , find the following
a. the instantaneous velocity function v=f'(x)
b. the velocity when x=0 and x=1 sec
c. the time(s) when v=0

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

The table represents a linear function. what is the slope of the function? –6 –4 4 6

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m