Scott has a jar of quarters and dimes. if there is $4.15 in the jar, and there are 4 dimes, how many quarters are in the jar?

3; 9 is 8 to -4

step-by-step explanation:

40 x 50 = 2000

step-by-step explanation:

answer:

at time x=0 we have 1000, at time x=1 we have 2000, at time x=2 we have 4000.  

so that's an initial value of 1000 and a ratio of 2,

y = 1000 (2^x)

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