Question

If 10 raised to the power y is 5, then find 10 raised to the power of - y
-5
1/2
1/-2
1/5​

Answer 1

Option c - 1/2 because 10 power -y is negative so answer in negative

Answer 2

$10^y = 5\\y= log_{10} (5)$

$10^{y-5} = 10^{log (5)-5} = 0.00005\\10^{\frac{y}{2}} = 10^{\frac{log (5)}{2}} = 2.27\\10^{\frac{y}{-2}} = 10^{\frac{log (5)}{-2}} = 0.447\\10^{\frac{y}{5}} = 10^{\frac{log (5)}{5}} = 1.38$