4. Which expressions can be rewritten as 1 over the base raised to a positive exponent? (2 points)

start fraction b superscript negative 2 baseline over b superscript 4 baseline end fraction
start fraction w superscript 5 baseline over w superscript negative 3 baseline end fraction
Start Fraction 5 superscript 3 baseline over 5 superscript 5 baseline end fraction
Start Fraction 4 superscript 7 baseline over 4 superscript 7 baseline end fraction

1 answer

Only one expression can be rewritten as 1 over the base raised to a positive exponent:

-start fraction b superscript negative 2 baseline over b superscript 4 baseline end fraction can be rewritten as 1 over b squared.