Evaluate (ab)^2 for a=4 and b=3.
a. 81
b. 144
c. 24
d. 36

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

I'm confused on this could anyone me and show me what i need to do to solve it.

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?