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Author Question: A circle has an area of 2.0 m2 . A second circle has triple the radius of the first. The area of the ... (Read 526 times)

mpobi80

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on: Jul 28, 2018
A circle has an area of 2.0 m2 . A second circle has triple the radius of the first. The area of the second circle is _____ times that of the first.
 a. 27
  c. 3.0
  b. 9.0
  d. 0.67

Question 2

The basic function of an automobile's carburetor is to atomize the gasoline and mix it with air to promote rapid combustion. Assume that 40 cm3 of gasoline is atomized into N spherical droplets. Each droplet has a radius of 2.0  10-5 m. Find the total surface area of these N spherical droplets.
 a. 60,000 cm2
  c. 20,000 cm2
  b. 24,000 cm2
  d. 2800 cm2


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xiaomengxian

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Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

A


mpobi80

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


xiaomengxian

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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