Please Help Me Out! Evaluate the expressions. Write your answer as a single base with a positive exponent.

(b^-7)^2 x b^6

a^-10 x a^8

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.

Which of the following functions corresponds to the above sinusoid? a. 10 cos πx - 5 b. -5 sin x - 5 c. -10 cos πx/2 - 0.5 d. 10 sin πx - 5