In how many ways can a chairman and a vice-chairman of a board of 6 members can occupy their seats.

5

Step-by-step explanation:

Sent from my iPhone and it is the email address that you sent me

the answer will be the last one

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.