Which mathematician wrote "The Elements"?

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

Ajar of gumballs contains 4 reds, 2 greens, and 6 blues. what is the probability of getting two blues in a row without replacement?

Asporting good store is offering 30 percent off of the original price(x) of football cleats. the discount will be reduced by an another $7 before sales tax.