3) A group of 16 people need to take an elevator to the top floor. They will go in
groups of eight. They are deciding who
will take the elevator on its second trip.
A) Permutation; 6,435
B) Combination: 3,217
C) Permutation; 518,918,400
D) Combination: 12.870

7

step-by-step explanation:

cosine

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.