Mark wants to fence 4 rectangular gardens, each with a length of feet and a width of feet. what is the total length of fencing mark needs to surround all 4 gardens?

Asphere has a diameter of 10 in. what is the volume of the sphere?

Charlie tosses five coins. what is the probability that all five coins will land tails up.

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.