# W 1 does not exist because f 3 does not exist w 1

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w' (1) does not exist because f ' (3) does not exist. w' (1) does not exist because g' (2) does not exist.
12. 1/1 points | Previous Answers SCalcET7 3.4.077. Find the 85th derivative of 13. 1/1 points | Previous Answers SCalcET7 3.4.079. The displacement of a particle on a vibrating string is given by the equation where s is measured in centimeters and t in seconds. Find the velocity of the particle after t seconds. y = cos 3 x . f (85) ( x ) = \$\$−385 sin (3 x ) s ( t ) = 9 + sin( 9 π t ) 1 5 v ( t ) = \$\$9π5 cos (9π t ) cm/s
14. 2/2 points | Previous Answers SCalcET7 3.4.080. If the equation of motion of a particle is given by the particle is said to undergo simple harmonic motion . (a) Find the velocity of the particle at time t . (b) When is the velocity 0? (Use n as the arbitrary integer.)
15. 2/2 points | Previous Answers SCalcET7 3.4.081. A Cepheid variable star is a star whose brightness alternately increases and decreases. For a certain star, the interval between times of maximum brightness is 6.1 days. The average brightness of this star is 4.0 and its brightness changes by ± 0.55 . In view of these data, the brightness of the star at time t , where t