#35 "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 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?"

Question

gsx · Answer

100+125+150+175+200+225+250+275+300=1800

anonymous · Answer

Im getting the answer 300

anonymous · Answer

•	This sequence is: (arithmetic or geometric).
•	The cost to build the tower is

gsx · Answer

Maybe i didn't understand the question right.
i though that
first 10 ft = $100
second 20 ft =$125

So a tower of 20 ft would cost $225.

anonymous · Answer

right

anonymous · Answer

After this can i ask a question

anonymous · Answer

The sequence is arithmetic, because the next term of the sequence is equal to the previous term plus a constant.

anonymous · Answer

okay but my instructor is asking for a introduction

anonymous · Answer

And that confusses me

gsx · Answer

If the answer is 300 then the second 10 ft costs 25 so a tower of 20 ft would be 125
if y= cost and x=length then
y(x)= 100+ 25((x/10)-1)

anonymous · Answer

Okay  so the sequence is:

anonymous · Answer

(arithmetic or geometric

gsx · Answer

I don't know these terms so i cant help

anonymous · Answer

i have it as a arithmetic