The correct option is B $225
Nini's wage per hour =8.80
Total hours worked in the week=24.6
Week's earning=8.80×24.6
To estimate the product 8.80×24.6 we need to estimate 8.80 and 24.6 to nearest natural number.
For estimation to nearest natural number we look at tenths place and follow the estimation rule
Rule: If the digit is 5 or greater than 5 we round up, if the digit is less than 5 we round down.
8.80 has 8 at tenths place, it rounds up to 9
Similary,
24.6 has 6 at tenths place, it rounds up to 25
So, 8.80×24.6=9×25=225
Shivani's estimated earning of the week is $225