Which of the following is exponential growth?

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2 points
y = 200(1 - 0.12)^t
y = 500(0.98)^3t
y = 750(1 - 0.45)^t
y = 1,000(1 + 0.27)^4t
Which of the following shows exponential decay of 55%?
*
2 points
y = 200(1 - 0.12)^t
y = 500(0.98)^3t
y = 750(1 - 0.45)^t
y = 1,000(1 + 0.27)^4t
Simplify the following:
*
2 points
8^2/3
8
4
2
0
Solve the following:
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2 points
2x^1/2=10
100
25
5
0
use only the answers i gave you