Calculate Cost of Radio Tower - Real world applications
a person hired a firm to build a CB radio tower. the firm charges $100 for labor for the first 10 feet. After that, the cost of the he labor for each succeeding 10 feet is $25more than the proceeding 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?