Which of the following represents a true statement? A: 19^21 x 19^3 = 1963

B: (24^8)^5 = 24^40

C: 20^1 x 20^1 = 20^0

D: 16^40/ 16^20 =16^2

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Mario is constructing a frame for 10 in. by 8 in. photo. he wants the frame to be the same with all the way around in the same area of the frame and photo to be 120 square inches what is the dimension of the frame?

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i