An investor invests $100 in a certificate, which compounds semi-annually, for a time period of one year. if he wants to quadruple his money in one year, what interest rate would be needed?

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

How do you find the area of a triangle

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.