Last year, wind turbines along a hilly ridge had an average output of 440 kilowatt hours per year. The turbines were upgraded, and now their average annual output is 45% more. What is the new average yearly output? please help

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.