Ineed to get 9, 6, 2, 13, and 12 in an equation that equals 10, using each number exactly one time. add, subtract, multiply, divide, and parentheses, but no exponents. is this doable?

391.6 is the correct answer

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)

hope this !

7 9/10 as an improper fractions is 79/10.

hope it : )