Answer: A
Explanation: multiply 128 by .85
Answer:
We are to find the error made by Sadie and then find the correct simplification.
The error Sadie made is that she wrote
as
instead of
.
The square root of
is
and so she could have further simplified.
The correct simplification is shown below:

They are expected to win back on average 50 cents back, which is a bad investment.