The cost of a drain pipe is directly proportional to its length. A pipe costing £21. 32 is 41 centimetres long. How many centimetres long would a drain pipe costing £34. 32 be?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

If g^-1(x) is the inverse of g (x) which statement must be true

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1