The first four terms of a sequence are shown below:
9,5, 1, -3
which of the following functions best defines this sequence?
of(1) = 9, f(n + 1) = f(n) – 4; for n 2 1
of(1) = 9, f(n + 1) = f(n) + 4; for n 2 1
f(1) = 9, f(n + 1) = f(n) - 5forn
1
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of(1) = 9, f(n + 1) = f(n) + 5; for n 2 1

Each of the four sides of a swimming pool measures 9 meters. the pool is 5 meters deep. how much water will be needed to fill it completely? a. 45 cubic meters b. 81 cubic meters c. 225 cubic meters d. 405 cubic meters reset next

100 points, hi, i’m not sure what to do here, the data doesn’t seem to be quadratic .? can anyone me, in advance

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6