Help me out with this pls my math was due yesterday

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Can someone tell me if this is perpendicular? !