What is the best approximation for the input value when f(x)=g(x)

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

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.

Hello, i need compare km^2 and km. what's difference in this?