Acorner shelf is 1/4 of a circle and has a radius of 10.5 inches . enter the area of the shelf in square inches . round your answer to the nearest hundredth .

First, find the area of the shelf if it were a full circle.
the formula for the area of a circle is a=pi(r squared)
a=pi (10.5 squared)
a=pi  x 110.25
a=3.14 x 110.25
a=346.185
now, you have to divide that area by 4 to get the area of the 1/4 circle
346.185/4=86.55