Express these numbers in standard form (a)5730(b)0.23(c)0.000231(d)715(e)5 00.8

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

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.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?