A circle's radius that has an initial radius of 0 cm is increasing at a constant rate of 7 cm per second. a. Write a formula to expresses the radius of the circle, r (in cm), in terms of the number of seconds, t, since the circle started growing. r = 7t Preview b. Write a formula to express the area of the circle, A (in square cm), in terms of the circle's radius, r (in cm). A = pir^2 Preview c. Write a formula to expresses the circle's area, A (in square cm), in terms of the number of seconds, t, since the circle started growing. A = pi(7r)^2 Preview d. Write your answer to part (c) in expanded form - so that your answer does not contain parentheses. A = Preview

A circle's radius that has an initial radius of 0 cm is increasing at a constant rate of 7 cm per second. a. Write a formula to expresses the radius of the circle, r (in cm), in terms of the number of seconds, t, since the circle started growing. r = 7t Preview b. Write a formula to express the area of the circle, A (in square cm), in terms of the circle's radius, r (in cm). A = pir^2 Preview c. Write a formula to expresses the circle's area, A (in square cm), in terms of the number of seconds, t, since the circle started growing. A = pi(7r)^2 Preview d. Write your answer to part (c) in expanded form - so that your answer does not contain parentheses. A = Preview

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter63: Volumes Of Pyramids And Cones

Section: Chapter Questions

Problem 32A: A piece in the shape of a frustum of a pyramid with regular octagon bases is 23.84 centimeters high....

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