A post of length 1.9 m needs to be driven into the ground to 60% of its length, using a mechanical hammer. If the first blow drives the pole by 13 cm and each subsequent blow is reduced by 0.75 cm, determine the number of blows needed to achieve this. Comment, with reasons, on the validity of the results obtained Proof of the result using quadratic formula.
A post of length 1.9 m needs to be driven into the ground to 60% of its length, using a mechanical hammer. If the first blow drives the pole by 13 cm and each subsequent blow is reduced by 0.75 cm, determine the number of blows needed to achieve this. Comment, with reasons, on the validity of the results obtained Proof of the result using quadratic formula.
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterA: Appendix
SectionA.4: Factoring And Quadratic Equations
Problem 40E
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A post of length 1.9 m needs to be driven into the ground to 60% of its length, using a mechanical hammer. If the first blow drives the pole by 13 cm and each subsequent blow is reduced by 0.75 cm, determine the number of blows needed to achieve this. Comment, with reasons, on the validity of the results obtained
Proof of the result using quadratic formula.
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