(d) Suppose that the satifaction received from a number of rides taken on a roller coaster 200 (2*1) '2х+1 Зx+4 0.5 is given by the function S(x) where S is the satisfaction received and x is the number of rides taken. (i) Find the rate at which the satisfaction changes with respect to the number of rides taken.
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- Find the average rates of change of f(x)=x2+2x (a) from x1=3 to x2=2 and (b) from x1=2 to x2=0.Let g(x) = square root of x +3. Compute the instantaneous rate of change of g (x) at x = 4.A tank initially contains 100 L of a well-mixed water-and-salt solution, with salt concentration of 20 kg in the solution. If the solution is exiting from the tank at a constant rate of 2 L per minute, what is the concentration of the salt (kilograms) in the solution at the point when the tank now only contains 50 L of the solution? Express your answers accurate to four decimal places.
- The analysis of tooth shrinkage by C. Loring Brace and colleagues at the University of Michigan’s Museum of Anthropology indicates that human tooth size is con-tinuing to decrease and that the evolutionary process has not yet come to a halt. In northern Europeans, for example, tooth size reduction now has a rate of 1% per 1000 years. a. If t represents time in years and y represents tooth size, use the condition that y = 0.99y0 when t = 1000 to find the value of k in the equation y = y0 ekt. Then use this value of k to answer the following questions. b. In about how many years will human teeth be 90% of their present size? c. What will be our descendants’ tooth size 20,000 years from now (as a percentage of our present tooth size)?A tank with a capacity of 25 L originally contains 15 L of brine with a concentration of 5 g/L of salt. Water containing 1 g/L of salt is entering at a rate of 5 L/min, and the mixture is allowed to flow out of the tank at a rate of 4 L/min. Find the concentration (in g/L) of salt in the tank when it is on the point of overflowing.Compute the second derivative of f(x)=ex+x at x = 1 using a step size h = 0.2
- Find the average rate of change for the function over the given interval y=-3x-x between x=5 and x=6A particle moves on the line y = 2x + 1 in such a way that its x−coordinate changes at a constant rate of 4 units per second. A right triangle is formed by the vertical line from the particle to the x−axis, the line connecting the particle to the origin, and the x−axis. At what rate is the area of the right triangle changing when x = 4?Find the average rate of change of the function f ( x ) = 1 x2 − 4 x + 4 , on the interval x ∈ [2,4].
- Estimate the instantaneous rate of change of the function f(x)=−x2+4x−4 at x=1 using the average rate of change over successively smaller intervals.Under certain conditions, cane sugar in water is converted into dextrose at a rate proportional to the amount that is unconverted at any time. If 75 kg at time t = 0, 8 kg are converted during the first 30 minutes, find the amount converted in 2 hours.A ladder 5 meters long is leaning against a vertical wall. Due to the smooth floor, the foot of the ladder is sliding away from the wall. Let x be the horizontal distance of the foot of the ladder from the wall and y be the height of the top of the ladder from the floor. Determine when will the rate of change of y with respect to x be numerically equal to the negative of the current value of x?