Nadia solved the equation 4x-4=20! 4x=16 x=4what error did she make

The diameter of a ball is 8 in. what is the volume of the ball? use 3.14 for pi. enter your answer as a decimal in the box. round only your final answer to the nearest hundredth.

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.