What type of angle would be measured at 84°?

What is the measure of the smallest angle in the diagram? 15 29 32 45

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

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