An outdoor ice skating arena is in the shape of a circle with a diameter of 42 feet. Which of the following is closest to the area of the arena?

Step-by-step explanation:

Since the outdoor ice skating arena is in the shape of a circle, we would determine its area by applying the formula for determining the area of a circle which is expressed as

Area = πr²

Where

π is a constant whose value is 3.14

r represents the radius of the circle

From the information given,

Diameter = 42 feet

Radius = diameter/2 = 42/2 = 21 feet

Therefore,

Area = 3.14 × 21² = 1384.74 square feet

Rounding up to the nearest whole number, area of the outdoor ice skating arena would be 1385 square feet

people went from manufacturing one object at a time by hand to manufacturing many objects in factories

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14