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## A circle has an area of 12. If the radius is increased by a factor of 2, what is the new area of the circle?

Answered by answersmine AT 22/10/2019 – 02:38 AM A=12. A=π×r^2(area of a circle)π×r^2=12r×2:π×(r×2)^2= π×r^2×4. Here you can see that the calculation is exactly the same as above except from the Factor 4. This Shows that the area is four times bigger than before: 12×4

## The area of circle b is 25 times greater than the area of circle a. The radius of circle a is 3. What is the radius of circle a of circle b

The area of circle b is 25 times greater than the area of circle a. The radius of circle a is 3. What is the radius of circle a of circle b

## Please help meee!!!! A circle has its center at (1, 4) and a radius of 2 units. What is the equation of the circle? (x − 1)2 + (y − 4)2 = 4 (x + 2)2 + (y + 4)2 = 2 (x + 1)2 + (y − 4)2 = 4 (x − 1)2 + (y − 4)2 = 2

Answer: A. Step-by-step explanation: We have been given that a circle has its center at (1, 4) and a radius of 2 units. We are asked to write the equation of the given circle. Since we know that the center-radius form of circle equation is: , where (h,k) is the …

## The circumference of a circle can be found using c=2/pi r. use the formula to solve for the radius of a circle, r.

Answer:  , where C is the circumference of the circle. Step-by-step explanation: We know that the formula to calculate the circumference of the circle is given by :- , where r is the radius of the circle. To find the expression for r , we divide on the both sides …

## A right circular cylinder has a volume of 500 cu in. If the base has a radius of 4 in., what's the altitude of the cylinder? Round your answer to two decimal places. A. 9.95 in. B. 19.79 in. C. 31.25 in. D. 29.84 in.

A right circular cylinder has a volume of 500 cu in. If the base has a radius of 4 in., what’s the altitude of the cylinder? Round your answer to two decimal places. A. 9.95 in. B. 19.79 in. C. 31.25 in. D. 29.84 in.

## What is a radius? Is it the point in the middle?How do you calculate the circumference using 3.14 pi?

Answered by answersmine AT 22/10/2019 – 03:32 AM The radius is the distance from the center point of a circle to the “edge” of the circle. To calculate the circumference you use the formula: C=(D)(pi)…D stands for distance from one end of the circle to the other through the center …

## The amount of time it takes to fill a whirlpool tub is inversely proportional to the square of the radius of the pipe used to fill it. If a pipe of radius 2.5 inches can fill the tub in 8 minutes, how long will it take the tub to fill if a pipe of radius 3.5 inches is used? How many inches would the tub fill approximately in minutes?

The amount of time it takes to fill a whirlpool tub is inversely proportional to the square of the radius of the pipe used to fill it. If a pipe of radius 2.5 inches can fill the tub in 8 minutes, how long will it take the tub to fill …

## If a wheel with a radius of 80 inches spins at a rate of 50 revolutions per minute, find the approximate linear velocity in miles per hour

If a wheel with a radius of 80 inches spins at a rate of 50 revolutions per minute, find the approximate linear velocity in miles per hour

## If a wheel with a radius of 30 inches spins at a rate of 500 revolutions per minute, find the approximate linear velocity in miles per hour.

30 inches @ 500 rpm = 15,000 inches per minute 15,000 inches per minute = 900,000 inches per hour (multiply by 60) 1 mile = 5,280 feet (google-able fact you shouldn’t have to memorize)1 foot = 12 inches (you probably already know this)900,000 inches = 75,000 feet (divide by 12) 75,000 feet …

## A circle has a radius of 9 m. Find the lengths s of the arc intercepted by a central angle of 18 degrees.

A circle has a radius of 9 m. Find the lengths s of the arc intercepted by a central angle of 18 degrees.

## A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and it is rotating with an angular velocity of 0.500 rev/s. what is its angular velocity (in rev/s) after a 22.0 kg child gets onto it by grabbing its outer edge? the child is initially at rest.

To answer this problem, we must remember that momentum is conserved. Therefore, Initial momentum = Final momentum In this case we use angular momentum which it is defined as: Momentum =0.5 m ω^2 So finding for final angular velocity, ωf: mi * ωi^2 = mf * ωf^2 120 kg * …

## Find the area of the sector with a central angle of 120° and a radius of 8 inches. leave in terms of ?. a.8 3 ? in2 b.16 3 ? in2 c.32 3 ? in2 d.64 3 ? in2

I’m assumig you meant ?=pi so the area of the sector would be the area of the circle times the fraction of the circle that is the fraction of the circle would be degrees/360 since 360 degrees in a circleand area of course is pir^2 sor=8degrees=120soarea=pi8^2 times 120/360area=64pi times 1/3area=64pi/3I …

## Find the radius of convergence, r, of the series. ? n2xn 7 · 14 · 21 · ? · (7n) n = 1

I’m guessing the series is supposed to be By the ratio test, the series converges if the following limit is less than 1. The first terms in the numerator’s denominator cancel with the denominator’s denominator: also cancels out and the remaining factor of can be pulled out of the limit …

## A circle has a central angle measuring 7pi/6 radians that intersects an arc of length 18 cm. What is the length of the radius of the circle? Round your answer to the nearest tenth. Use 3.14 for pi. 3.7 cm 4.9 cm 14.3 cm 15.4 cm

You need to determine the number of ways in which 30 competitors from 50 can qualify. First, you have to realize that the order is irrelevant, that is: it is the same competitor_1, competitor _2, competitor _3 than competitor_3, competitor_2, competitor_1, or any combination of those three competitors. So, the …

## What is the arc length of a circle that has a 6-inch radius and a central angle that is 65 degrees? Use 3. 14 for pi and round your answer to the nearest hundredth

You need to determine the number of ways in which 30 competitors from 50 can qualify. First, you have to realize that the order is irrelevant, that is: it is the same competitor_1, competitor _2, competitor _3 than competitor_3, competitor_2, competitor_1, or any combination of those three competitors. So, the …

## A cylinder has its height doubled and its radius cut to one third. What is the ratio of the volumes of the modified cylinder to the original cylinder?

Solution: The Given Rectangle having dimensions Length = 80 cm Breadth = 50 cm Let the Six squares which has been cut from this rectangle have side of length a cm. Area of each square = (Side)²= a² Area of 6 Identical Squares = 6 × a²= 6 a² If …

## A sphere has a radius of 3 and a hemisphere has a radius of 6. Compare the ratio of the volume of the sphere to the volume of the hemisphere.

Solution: The Given Rectangle having dimensions Length = 80 cm Breadth = 50 cm Let the Six squares which has been cut from this rectangle have side of length a cm. Area of each square = (Side)²= a² Area of 6 Identical Squares = 6 × a²= 6 a² If …

## Circle A has an area of 452.16 ft^2 with a radius of 12 ft. If circle B has a radius of 17 ft, what is its area?

Hello! Okay let me start off by explaining to how you can simplify a square root… Let’s take √12 for instance… the factors of this number are 2, 3, 4, and 6 …. and out of these 4 numbers there is one perfect square, which is 4 so you can split √12 …

## If a wheel with a radius of 70 inches spins at a rate of 600 revolutions per minute, find the approximate linear velocity in miles per hour.

If a wheel with a radius of 70 inches spins at a rate of 600 revolutions per minute, find the approximate linear velocity in miles per hour.

## A local carpet company has been hired to carpet a planetarium which is in the shape of a circle. If the radius of the planetarium is six yards, and the cost of the carpet is \$14 per square yard, find the total cost to carpet the planetarium. (use 3.14 for π )

A local carpet company has been hired to carpet a planetarium which is in the shape of a circle. If the radius of the planetarium is six yards, and the cost of the carpet is \$14 per square yard, find the total cost to carpet the planetarium. (use 3.14 for …

## Find the volume v of the described solid s. the base of s is a circular disk with radius 5r. parallel cross-sections perpendicular to the base are squares.

Find the volume v of the described solid s. the base of s is a circular disk with radius 5r. parallel cross-sections perpendicular to the base are squares.

## If you double the radius of the earth and keep the mass of the earth the same, the acceleration of gravity on the surface of the earth will be approximately …

Answer: a) The time the police officer required to reach the motorist was 15 s. b) The speed of the officer at the moment she overtakes the motorist is 30 m/s c) The total distance traveled by the officer was 225 m. Explanation: The equations for the position and velocity …

## If the radius of a circle is 6 inches, how long is the arc subtended by an angle measuring 70°? a.3 7 ? inches b.7 2 ? inches c.7 3 ? inches d.7 6 ? inches

The basis to respond this question are: 1) Perpedicular lines form a 90° angle between them. 2) The product of the slopes of two any perpendicular lines is – 1. So, from that basic knowledge you can analyze each option: a.Lines s and t have slopes that are opposite reciprocals. …