The monthly revenue R (in dollars) of a telephone polling service is related to the number ï of completed responses by the function R(x) = −13000 + 30√/2.5x² + 20x, 0≤x≤ 1000. If the number of completed responses is increasing at the rate of 10 forms per month, find the rate at which the monthly revenue is changing when x = 500. The monthly revenue is changing by $ per month.

A company selling widgets has found that the number of items sold, x, depends upon the price, p at which 70000 they're sold, according the equation a (0.5p + 1)² Due to inflation and increasing health benefit costs, the company has been increasing the price by $0.06 per month. Find the rate at which revenue is changing when the company is selling widgets at $4 each. Revenue is changing at a rate of dollars per month.

A company selling widgets has found that the number of items sold, x, depends upon the price, p at which 30000 they're sold, according the equation = (0.6p + 1)² Due to inflation and increasing health benefit costs, the company has been increasing the price by $0.03 per month. Find the rate at which revenue is changing when the company is selling widgets at $3 each. Revenue is changing at a rate of dollars per month.

The function V(t) = 3500t +18000, where V is value and t is time in years, can be used to find the value of a large copy machine during the first 5 years of use. a. What is the value of the copier after 3 years and 3 months? After 3 years and 3 months, the copier is worth $ b. What is the salvage value of the copier if it is replaced after 5 years? After 5 years, the salvage value of the copier is S c. State the domain of this function. d. Sketch the graph of this function. 18000- 16000- 14000- 12000- 10000- 8000- 6000- 4000+ 2000+ Draw sts