Starting on day 1 with 1 jumping jack Bob doubles the number of jumping jacks everyday how many jumping jacks will he do on day 10

This figure consists of a rectangle and semicircle. what is the perimeter of this figure use 3.14 for pi 60.84m 72.84m 79.68m 98.52m

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?