Select all of the true statements. is the area of a circle of radius 1.
is the area of a circle of diameter 1.
is the circumference of a circle of radius 1.
is the circumference of a circle of diameter 1.
is the constant of proportionality relating the diameter of a circle to its circumference.
is the constant of proportionality relating the radius of a circle to its area.

step-by-step explanation:

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40