A bench needs to be placed in the exact middle of two tree. Describe three methods the designer can use to find out where to place the bench

you could measure the distance between those two trees and divide it by two and place the middle of the bench over that point.

with a picture, draw a straight line between both trees and using a compass find the middle point .

stethere all not eveanp-by-step explanation:

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.