Question

need help here is someone can help me with my math
A person hired a firm to build a CB 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 25more 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 feet tower? need help please

Answer 1

100+25+25+125+150

Answer 2

this is my first math in 15 years just need help if anyone can help me with this

Answer 3

10 feet charge = $100
20 feet charge = $125
30 feet charge = $150
40 feet charge = $175
50 feet charge = $200
60 feet charge = $225
70 feet charge = $250
80 feet charge = $275
90 feet charge = $300

The cost to build a 90-foot tower is the summation of all above.

That is

=100+125+150+175+200+225+250+275+300

=$ 1800

The cost will be $1800

Answer 4

all i did was copy and paste question in a google searcH

Answer 5

are you sure this the right answer ? and that's how it was explained ..
is there a formula?

Answer 6

This problem involves arithmetic sequence since labor cost for each successive 10 ft remains constant at $25

The arithmetic sequence of the labor costs is 100, 125, 150, …

For finding the cost for building a 90 ft tower, we sum the first 9 terms of the above sequence

a = 100, d = 25, n = 9

Sn = (n/2)[2a + (n - 1)d]

S9 = (9/2)[2 * 100 + (9 - 1)(25)]

= 1800

The cost will be $1800
Source:
ww2.justanswer.com/.../2010-11-15_071033...

Answer 7

man you the best ... Thanks brother can it help me with other questions ..