The earth has a diameter of 7917.5 miles. What is the distance a plane would have to fly if it could fly around the entire equator?

If a =6, what is the value of 2a(3b + 5c)?

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2