Probably the last one
Use the equation for the area of a triangle 1/2(bxh)
Then multiply that number by 2 to get the area of the complete shape.
3.5 - 3.2 = 3.8 - 3.5 = 4.1 - 3.8 = 0.3 (common difference)
Answer:
ok so 10 times 4 equals 40 and then 40 times six equals 240 but I don't know what standard notation is