Without a calculator, how do you solve for z?

Given: 10^x = 2^y

Find z if: 5^x = 2^z

choices: 2^(x+y), 2^(y-x), 2^(y/x), or 2^(y+1)

Clearly z will be less than y, since 5^x is much less than 10^x... but beyond that I cannot go.

Without a calculator, how do you solve for z?

Given: 10^x = 2^y

Find z if: 5^x = 2^z

choices: 2^(x+y), 2^(y-x), 2^(y/x), or 2^(y+1)

Clearly z will be less than y, since 5^x is much less than 10^x... but beyond that I cannot go.

Given: 10^x = 2^y

Find z if: 5^x = 2^z

choices: 2^(x+y), 2^(y-x), 2^(y/x), or 2^(y+1)

Clearly z will be less than y, since 5^x is much less than 10^x... but beyond that I cannot go.

- stapel_eliz
**Posts:**1670**Joined:**Mon Dec 08, 2008 4:22 pm-
**Contact:**