If you roll two number cubes, what is the probability of their sum being seven or higher?

7/12
5/12
7/5
5/7

.19875994384

step-by-step explanation:

1699/ 8548

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.