Find the center and radius of this circle (x+13)^2+(y+2)^2=81

You spin the spinner shown below once. each sector shown has an equal area. what is p(beaver ) p(beaver)? if necessary, round your answer to 2 2 decimal places.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries