Question 600584
3^x grows faster because from x = 4 to x = 5, we get the following


x = 4:

x^3 = 4^3 = 64

3^x = 3^4 = 81


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x = 5


x^3 = 5^3 = 125

3^x = 3^5 = 243



So as x goes from 4 to 5, x^3 goes from 64 to 125. At the same time, 3^x goes from 81 to 243. 


Subtract each result:


For x^3: 125 - 64 = 61


For 3^x: 243 - 125 = 118


and you can see that the change from x = 4 to x = 5 is much larger for 3^x


This shows us that 3^x grows faster as x increases.