The formula for finding the present value of an item that depreciates yearly is v = c - crt. in this formula, v is the present value, c is the original cost, r is the rate of depreciation per year, and t is the number of years that have passed. after 7 years, what is the value of a car originally costing $27,000 that depreciated at a rate of 0.1 per year

Acylinder has volume 45π and radius 3. what is it’s height?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?