John spent 20% of his money on food. He spent 2/5 of the remainder on a toy. The toy cost $12. What percentage of his money did he spend on the toy? How much money did he have at first?

He amount of carbon-14 present in animal bones t years after the animal's death is given by p(t)equals=upper p 0 e superscript negative 0.00012097 tp0e−0.00012097t. how old is an ivory tusk that has lost 26% of its carbon-14?

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose