Ten people are entered in a race. if there are no ties, in how many ways can the first three places come out?

a. 1440

b. 720

c. 30

d. 132

(720) is the right answer

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.

faster, im not sure why but i know it is faster