42 times 10 is 420. hope this helps
Answer:
175 square feet
Step-by-step explanation:
the area of the whole thing is 400 ft. (20 x 20=400)
i got the 20 from the perimeter b/c 20+20+20+20=80
then subtract the area of the pool from 400 to get 175.
24 single felled organisms there are to 30 minute periods in each hour which produces 2 organisms that is 12 periods and 12 multiplied by 2 is 24