I will give points away

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years