Find 3√27 +3√64 - 3√125

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

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.