MAT 210 QUIZ 7B KEY

# MAT 210 QUIZ 7B KEY - MAT210_12.3-12.5 1 2 a Quiz...

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Unformatted text preview: MAT210_12.3-12.5 1. 2. a) Quiz 7-VerB-Banerjee (2 pts)The position 5 of a point (in feet) is given as a function oftime t (in seconds). ‘ W) = 3x5+4t2 Find the point's acceleration at t=3 seconds. Round your answer to 2 decimal places. \i’ '2— S (k 5 2 4c 5 +H E '- ‘Qi e t s ( s) : J5 it 1» + ., a ssh.) ( em»: Jig—:33; Hi 0M5) =1 tSH(3&gt;3 a &quot;-_3_-—; (3 3.5g -+&amp; :: l 1' we #14:...“ (2 pts)The graph of the function, f (x), is given MAT210_12.3-12.5 Quiz 7—VerB—Banerjee Name: 3. (2 pts)F ind x—values of all inﬂection points of f (x) = 4x3 — 24):2 + 14x — 20 15,60 1‘ llf—Hﬁe 4&quot;“! ,F&quot;(L3 1“ QLUL’HQ 1 a. MAL , ~_4__ ‘ EamVNthwn Pill/‘5 ....__.Z:/ If H(i\ ,3 Q 7:} 219‘} lg a.» U Q. {2.11 4. (2 pts)A spherical party balloon is being inflated with helium pumped in at a rate of 12 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 4 ft? . . 4 (The volume ofa Sphere ofradlus r 13 V = 5711”) Round your answer to two decimal places. ‘SJ—Ni’ : A: JJ: e—A—M— : it n g Jxl' .49; (Li &gt;3; ‘ 0U —5 s is» w _' 17 '- S. (2pts)The area of a circular spot is growing at a rate of 1400 mz/s. How fast is the radius growing when it equals 15,000 m? Leave your answer in the exact form.( A = m2 m” isms/t a: lag-530i._-s ﬁt &quot;&quot; ‘fﬁ? : ﬁlmy ...
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