9. The following series is arithmetics 8+13+18+*+138
(6) Determine the number of terms in this series. Show how you arrived at your answer.
(1) Determine the sum of this series. A numerical answer alone will earn at most one point.

step-by-step explanation:

hi there!

step-by-step explanation:

a roof pitch is basically for every inch rise there is 12 inches run.

the height of the roof is also known as the rafter.

formula: rafter^2 = rise^2 + run^2

rafter^2 = 5^2 + 12^2

rafter^2 = 25 + 144

rafter ^2 = 169"^2

the height of the roof from the lowest point to the highest point is 169"^2.

hope this : )