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March 2, 2015

March 2, 2015

Posted by **Derek** on Sunday, October 10, 2010 at 12:26pm.

13 instructors

15 instructors

105 instructors

77 instructors

- Mat 126 -
**Ms. Sue**, Sunday, October 10, 2010 at 12:37pmRatio:

3000/90 = 3500/x

Cross multiply:

3000x = 315000

x = ?

- Mat 126 -
**Kelli**, Sunday, November 21, 2010 at 8:51pmCross multiply 3000/90=3500/x

3000x=315,00 divide each side by 3000 and you get x=105 then take 105 and subtract from the original number of 90 and you get 15. So they need to hire 15 more instructors to keep the same student/teacher ratio.

- Mat 126 -
**kiesha**, Monday, October 3, 2011 at 1:09amA person hires his firm to build a Cb radio tower. The firm charges $100 for labor for the first ten feet.

After, that the cost of the labor for each succeeding 10 feet is $25 more than the preceding 10 feet. That is, the next feet will cost $125, the next 10 feet will cost $150, etc. How much will it cost to build a 90-foot tower?

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