Which explains the necessary step to calculate the area of a semi-circle? O Pi times the diameter.
O Radius times Radius times Pi
O (Radius times Radius times Pi) divided by 2
O (Diameter times Pi) divided by 2.

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

$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