Question 146747
b)

y=2(3)^x
y=6(9)(9)^x

So we want

2(3)^x=6(9)(9)^x
3^x=3(3^2)(3)^(2x)
3^x=3^(2x+3)

so x=2x+3
-3=x.
And y becomes y=2(3)^(-3)=2/27

c.
y=1000(.1)^(2x)
y=10^x

so we want
1000(.1)^(2x)=10^x
10^3(10^(-1))^(2x)=10^x
10^(-2x+3)=10^x

so -2x+3=x
and x=1
y becomes 10.