If a circle has a radius of 5 cm then what is the diameter?

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

A50% increase followed by 33 1/2% decrease

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]