A sprinkler sprays water over a distance of 40 feet and rotates through an angle of 80'. Find the area watered by the
sprinkler
55.85 square feet
111701 square feet
558.51 square feet
111.70 square feet

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step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

1/3 + 1/5 = 8/15.

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