A magazine company estimates that its monthly cost is C ( x ) = 700x^2 + 400x and its monthly revenue is R ( x ) = − 0.4 x^3 + 900x^2 − 200x + 600, where x is in thousands of magazines sold. The profit is the difference between the revenue and the cost. What is the profit function, P(x)?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Arecipe calls for 2 2/4 cups of raisins, but julie only has a 1/4 measuring cup. how many 1/4 cups is needed to measure out 2 2/4 cups of raisins?

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years