pi r squared, it doesnt let me type out the symbols sorry
B. if it is 7 inches wide it will be 6 inches tall
When you divide you get 6.666667 then in fraction it is 20/3 so in mix number 6 2/3.
A) you cannot combined square roots if the radicands aren't the same.
Its like variables. You can only add like terms. IE You cannot add 2x +3y.
Its the only rule that applies to the problem.