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April 30, 2016

Homework Help: Mathematics

Posted by Brielle on Monday, November 26, 2007 at 4:14pm.

I dont 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
• Mathematics - Michael, Monday, November 26, 2007 at 4:21pm

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.)

• Mathematics - Brielle, Monday, November 26, 2007 at 4:53pm

Is the first one about 27 minutes then?

• Mathematics - Ms. Sue, Monday, November 26, 2007 at 5:29pm

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

• Mathematics - jAcKiE, Monday, November 26, 2007 at 6:28pm

ok thank-you!