He can travels ¾ of a mile in 1/3 of an hour. How long will it take Mr. Gregg to travel 9 miles?

4 hours

Step-by-step explanation:

first you find out how much 3/4 of a mile is in 9 miles

1/4 = .75

9 divided by .75 = 12

So it takes 12 of 3/4 of a mile to go to 9 miles

Then multiply 12 by 1/3 to find he time since it takes 1/3 of an hour to travel 3/4

12 * 1/3 = 4

So it will take Mt Gregg 4 hours to travel 9 miles

7

step-by-step explanation:

the answer would be 7

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours