What is the area of this shaded region?

21π in²

A is correct

Step-by-step explanation:

In the given figure, two concentric circle form.

Diameter of inner circle = 4 in

Thickness between the circle 3 in

Diameter of outer circle = 4 + 3 + 3 = 10 in

Radius is half of diameter of circle.

Outer circle radius, R = 5 in

Inner circle radius, r = 2 in

Formula:

Area of circle

Area of shaded region = Area of outer circle - Area of inner circle

Hence, The area of shaded region is 21π in²

could you provide figure.

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720