Match each value to its part in the expression 68h + 13

It takes a total of 6 hours to fill up an inground backyard pool using a standard house. a function can represent this situation to represent the amount of water in the pool until it is full a function of time the hose is running. determine the domain for the function

How many zeros does the function f(x)=4x3-x2+1 have

How do you solve a question like this?