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A rock falls from a tower that is 160 feet high. As it is falling, its height is given by the formula h=160-16r². How many seconds will it take for the rock to hit the ground (h=0)? Round your answer to the nearest tenth, if necessary.

A rock falls from a tower that is 160 feet high. As it is falling, its height is given by the formula h=160-16r². How many seconds will it take for the rock to hit the ground (h=0)? Round your answer to the nearest tenth, if necessary.

Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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QUESTION 10 A rectangular garden has dimensions of 17 feet by 11 feet. A gravel path of consistent width is to be built around the garden. How wide can the path be if there is enough gravel for 380 square feet? QUESTION 11 A rock falls from a tower that is 160 feet high. As it is falling, its height is given by the formula h=160-16t². How many seconds will it take for the rock to hit the ground (h=0)? Round your answer to the nearest tenth, if necessary. QUESTION 12 Mary lives on a corner lot. The neighborhood children have been cutting diagonally across her lawn instead of walking around the yard. If the diagonal distance across the lawn is 30 feet and the longer part of the sidewalk is twice the shorter length, how many feet are the children saving by cutting across the lawn? Round to the nearest foot if necessary.
Transcribed Image Text:QUESTION 10 A rectangular garden has dimensions of 17 feet by 11 feet. A gravel path of consistent width is to be built around the garden. How wide can the path be if there is enough gravel for 380 square feet? QUESTION 11 A rock falls from a tower that is 160 feet high. As it is falling, its height is given by the formula h=160-16t². How many seconds will it take for the rock to hit the ground (h=0)? Round your answer to the nearest tenth, if necessary. QUESTION 12 Mary lives on a corner lot. The neighborhood children have been cutting diagonally across her lawn instead of walking around the yard. If the diagonal distance across the lawn is 30 feet and the longer part of the sidewalk is twice the shorter length, how many feet are the children saving by cutting across the lawn? Round to the nearest foot if necessary.
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