How many quaters are in $12.25 write the equation

pls help meh

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

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?