Does the sign need t be flip when solving

What is the greater volume 72 quarts or 23 gallons

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.)

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i