Answer:
Equation of given circle :- x² + y² = 4
Step-by-step explanation:
The equation of the circle with center (0, 0) and radius r is given by,
x² + y² = r²
It is given that, a circle with center (0,0) and (-1,-3) a point on the circle
To find the radius of circle
radius r = √[(0 - - 1)² + (0 - -3)²] =√(1 + 3) =√4 = ±2
r = 2
<u>To find the equation of circle</u>
x² + y² = r²
x² + y² = 2²
x² + y² = 4
Answer:
b
Step-by-step explanation:
The volume (V) of a sphere is calculated as
V = πr³ ( r is the radius )
Given V = π , then
πr³ = π ( multiply both sides by 3 to clear the fractions )
4πr³ = 32π ( divide both sides by 4π )
r³ = 8 ( take cube root of both sides )
r = = 2
Answer: 24,000
<u>Step-by-step explanation:</u>
The instructions state to multiply the number of cars by 250 ft² and then double it (multiply by 2).
48 cars × 250 ft² × 2 = 24,000 ft²