# Previous answers scalcet8 27501xp the displacement in

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2. 5/5 points | Previous Answers SCalcET8 2.7.501.XP. The displacement (in meters) of a particle moving in a straight line is given by s = t 2 6 t + 15 , where t is measured in seconds. (a) Find the average velocity over each time interval. (i) [3, 4] 1 m/s (ii) [3.5, 4] 1.5 m/s (iii) [4, 5] 3 m/s (iv) [4, 4.5] 2.5 m/s (b) Find the instantaneous velocity when t = 4. 2 m/s 3. 3/3 points | Previous Answers SCalcET8 2.7.031. Find f ' ( a ). f ( x ) = 4 x 2 3 x + 4 f ' ( a ) = \$\$8 a −3
6/5/2019 hw07S2.7-8 4/10 4. 3/3 points | Previous Answers SCalcET8 2.7.504.XP. The limit represents the derivative of some function f at some number a . State such an f and a . lim x 4 2 x 16 x 4 f ( x ) = x 2 , a = 4 f ( x ) = 2 x , a = 16 f ( x ) = 4 x , a = 2 f ( x ) = 4 x , a = 16 f ( x ) = 2 x , a = 4
6/5/2019 hw07S2.7-8 5. 3/3 points | Previous Answers SCalcET8 2.7.056. The quantity (in pounds) of a gourmet ground coffee that is sold by a coffee company at a price of p dollars per pound is Q = f ( p ). (a) What is the meaning of the derivative f ' ( 5 )? What are the units of f ' ( 5 )? (b) In general, will f ' ( 5 ) be positive or negative? The rate of change of the price per pound with respect to the quantity of coffee sold. The supply of coffee needed to be sold to charge \$5 per pound. The rate of change of the price per pound with respect to the quantity of coffee sold when the price is \$5 per pound. The rate of change of the quantity of coffee sold with respect to the price per pound when the price is \$5 per pound. The price of the coffee as a function of the supply.
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