its in the second chapter in calculus 1

Calculus
Tutor: None Selected Time limit: 1 Day

The circumference of a sphere was measured to be 76 cm with a possible error of 0.5 cm.

(a) Use differentials to estimate the maximum error in the calculated surface area. (Round your answer to the nearest integer.)
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What is the relative error? (Round your answer to three decimal places.)
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(b) Use differentials to estimate the maximum error in the calculated volume. (Round your answer to the nearest integer.)
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What is the relative error? (Round your answer to three decimal places.)
?
Jun 14th, 2015

Thank you for the opportunity to help you with your question!

S = 4*pi*r^2 

delta S = 8*pi*r delta r = 8*pi*76*0.5 = 955 cm^2 

relative error = dela S/S = 8 pi*r*deltar / (4*pi*r^2) =  2delta r/r = 1/76 = 0.013

b) V= 4/3 pi*r^3

dV = 4pir^2 dr  = 4*pi*76^2 *0.5 = 36292

relative error = 4pi r^2 dr / (4/3*pir^3) = 3dr/r = 1.5/76 =  0.020 

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 14th, 2015

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