Answer:
The approximate cost during the year 1987 was $7,533
Step-by-step explanation:
The complete question in the attached figure
we have
y -----> is the cost in dollars
x -----> is the year
Looking at the graph we have the points
(1983,5,047) and (1991, 10,019)
To determine the cost in the year 1987, find out the midpoint between the two given points
The formula to calculate the midpoint between two points is equal to

substitute the values


therefore
The approximate cost during the year 1987 was $7,533
+8 is the greatest then -8
A=3,500×(1+0.03÷2)^(2×20)
A=6,349.06
Answer:
B I'm pretty sure
Step-by-step explanation:
9 and 4 have 36 in common
to get 9 to 36 you multiply it by 4 and 2x4 is 8
to get 4 to 36 you multiply it by 9 and 1x9 is 9
9+8 is 17