I don't understand one problem and if you have the time could you please check the other to that follow?

1. Jake was the winner of the mens bike race. He finished the race in 1 hour, 33 minutes, and 32 seconds. Lily had a time of 2 hours and 52 seconds. How much faster was Jake than Lily to the nearest minute?

It took 30 years to build the Great Pyramid at Giza. The pyramid has 2,300,000 blocks. If the pyramid was built continuously, 24 hours a day for 30 years. How many blocks were place on the pyramid per hour?

I got about nine blocks...is that right?

i also have another problem:
To qualify for the Boston MArathon, a runner must have a time in another marathon of 3 hours and 20 minutes. To the nearest 10th of a minute, what is the runners pace (minutes per mile) in order to complete 26.2 miles in 3 hours and 20 minutes?

i got 7.6

For the first one, all you have to do is subtract Lily's time from Jake's time.

Yes, it is about 9 blocks. (Convert 30 years to hours. Then, divide the number of blocks by the number of hours.)

Yes, it is about 7.6. (Convert the given time to minutes. Then, divide the number of minutes by the number of miles.)

Is the first one about 27 minutes then?

Yes. I got 27 minutes and 20 seconds; rounded to the nearest minute is 27 minutes.

ok thank-you!

To solve the first problem, we need to find the time difference between Jake and Lily. To do this, we will convert both their times to minutes:

Jake's time = 1 hour + 33 minutes + 32 seconds = 60 minutes + 33 minutes + 32/60 minutes = 93.53 minutes.
Lily's time = 2 hours + 52 minutes = 120 minutes + 52 minutes = 172 minutes.

Now, we can subtract Lily's time from Jake's time to find the difference:
93.53 minutes - 172 minutes = -78.47 minutes.

Since we want to find the difference in minutes, we round -78.47 to the nearest minute, which is -78 minutes. However, a negative value does not make sense in this context, so we take the absolute value of -78 to get 78 minutes. Therefore, Jake was 78 minutes faster than Lily to the nearest minute.

For the second problem, we are given that it took 30 years to build the Great Pyramid at Giza with 2,300,000 blocks. To find the average number of blocks placed per hour, we need to divide the total number of blocks by the total number of hours:

Total number of hours = 30 years * 365 days/year * 24 hours/day = 262,800 hours.

Average number of blocks per hour = 2,300,000 blocks / 262,800 hours ≈ 8.75 blocks per hour.

So, the correct answer is approximately 8.75 blocks placed on the pyramid per hour.

Now, let's solve the third problem. We are given that in order to qualify for the Boston Marathon, a runner must have a time of 3 hours and 20 minutes in another marathon, which is equivalent to 200 minutes.

The marathon distance is 26.2 miles. To find the runner's pace in minutes per mile, we divide the total time (200 minutes) by the distance (26.2 miles):

Pace = Total time / Distance = 200 minutes / 26.2 miles ≈ 7.63 minutes per mile.

To the nearest 10th of a minute, the runner's pace in order to complete 26.2 miles in 3 hours and 20 minutes is approximately 7.6 minutes per mile.

So, your answer of 7.6 is correct.