The area of a circle is represented by the following expression, where r is the radius of the circle. find the approximate area of a circular pool cover with a radius of 12.5 meters. use 3.14 for .

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?

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?

Mr. walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?