# math

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A person hired a fire to build a CB radio tower. the firm charges 100 for labor for the first 10 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 10 feet will cost \$125, the next 10 feet will cost \$150. etc. How much will it cost to build a 90- foot tower

• math -

1st 10 Ft = \$100.
2nd 10 Ft = \$125.
3rd 10 Ft = \$150.
4th 10 Ft = \$175.
5th 10 Ft = \$200.
6th 10 Ft = \$225.
7th 10 Ft = \$250.
8th 10 Ft = \$275.
9th 10 Ft = \$300.

TOT. = \$1800.

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