A circle has a radius of 4 feet. If the circle’s radius is increased by 30%, how much bigger would the area of the new circle be?

Factor the polynomial 8y^2 - 72 btw "^" means exponent

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)