A square pyramid has a volume of 20 cubic units. What would be the change to the volume if the dimensions of the square base were doubled?

a. The volume would be three times the original

b. The volume would be twice the original

c. The volume would be eight times the original

d. The volume would be four times the original .

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point