Answer:
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A........................................
136 yd^2
The area formula of a triangle is 1/2*b*h
So, base = 16 and height = 17
1/2*16*17 (half of 16 is 8)
8*17 = 136
Hope that helps! :)
When n = 1 first term = -6
n = 2 second term = 0
n = 3 third term = 6
n = 4 4th term = 12
so we have an Arithmetic sequence first term = -6 and common difference = 6
Sum 14 terms = (14/2)[2*-6 + (14-1)*6]
= 462 answer