You walk 1/2 miles in 1/4 hour. A. use this information to write a ratio to represent your speed in miles per hour. B. use the ratio to compute your unit rate in miles per hour.

Rena used the steps below to evaluate the expression , when . step 1: substitute into the expression. step 2: simplify the parentheses. step 3: evaluate the power to a power. step 4: use reciprocals and find the value. in which step did rena make the first error?