Mathematics, 23.07.2019 17:00 huangjianhe135

Acar drives in a circular path with a diameter of 1200 feet. if the car completes exactly two laps each minute, what is the car's speed, in feet per second? express your answer to the nearest whole number.

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Answer from: shanyeah

126

Step-by-step explanation:

Each lap is the length of the circumference of the circle, 1200pi feet. The car drives 2400pi feet every 60 seconds, or 2400pi/60 feet per second. Rounded to the nearest whole number, this is 126 feet per second.

Answer from: kmcpig

D=rt where d is distance, r is the rate (speed), and t is time. the circumference of the circle is found by 2πr. so the circumference of the circle made by the car is 1200π. Now, we can divide both sides of the equation by our time. It takes 30 seconds for the car to complete one circle since the car does 2 every 60 seconds. this means the speed is 1200π/30 which comes out to 125.66 feet per second. The answer is 126 ft/s.

Answer from: Quest

fabric (square meters) cloaks

7 21

4/3 4

step-by-step explanation:

we are told that harry needs 2 square meters of fabric for every 6 wizard cloaks he makes.

1. first of all we will find how many cloaks can be made from 1 square meter of fabric by dividing 6 by 2.

we can see that 3 cloaks can be made from 1 square meter of fabric. now we will multiply 3 by 7 to find number of cloaks made from 7 square meters of fabric.

therefore, harry will make 21 cloaks from 7 square meters of fabric.

2. let us find how many square meters of fabric will be needed to make 4 cloaks.

first of all we will find fabric needed for 1 cloak by dividing 2 by 6.

we can see that fabric needed for 1 cloak is square meter. now we will multiply by 4 to find fabric needed for 4 cloaks.

Answer from: Quest

parallelogram is the answer

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Acar drives in a circular path with a diameter of 1200 feet. if the car completes exactly two laps e...

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