what is the area of trapezoid abcd with bases ab and cd , if: a ab = 10 cm, bc = da = 13 cm, cd = 20 cm;

When amy exercises in her fitness center for 1 hr she burns a total of 475 calories.if she burns 9 calories a minute jogging on the treadmill and then burns 6.5 calories a minute pedaling on the stationary bicycle how many minutes of the hour does she spend exercising on the bicycle?

Jerrold has to buy 12 copies of a textbook which costs $36.25 per copy. how much must he spend for them?

Which of the following characteristics of the arctic rabbit is specifically an adaptation to living in the tundra? a. small size b. keen eyesight c. strong legs d. white fur