105,000 would be the correct answer to your problem.
Y^3 * y^5 = y^8. you add the exponents
ANSWER:
0.25
i attached my work, hope this helps
To answer this item, note that what needs to be done is to substitute -4 to all x's in the equation. That is,
F(x) = 2^x
will become,
F(-4) = 2^(-4) = 1/16 or 0.0625
I think the answer would be x= 4/7 y = +-16/7