Which expression is equivalent to k^-10 a) k^12 - k^2 b) k^-5 + k^-5 c) k^-5 k^2 d) (1/k)^10

D) (1/k)^10 is your answer.

when there is a negative sign in the powers, place the number and power over 1

hope this helps

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .