A package of frozen strawberries is taken from a freezer at -5˚C into a room at 20˚C. At time t, the average temperature of the strawberries is increasing at the rate of T ‘(t) = 10e-0.4t degrees Celsius per hour. Find the temperature of the strawberries at time t.
> Find all points (x, y) where f (x, y) has a possible relative maximum or minimum. Then, use the second-derivative test to determine, if possible, the nature of f (x, y) at each of these points. If the second-derivative test is inconclusive, so state. f (
> Find all points (x, y) where f (x, y) has a possible relative maximum or minimum. Then, use the second-derivative test to determine, if possible, the nature of f (x, y) at each of these points. If the second-derivative test is inconclusive, so state. f (
> Find all points (x, y) where f (x, y) has a possible relative maximum or minimum. Then, use the second-derivative test to determine, if possible, the nature of f (x, y) at each of these points. If the second-derivative test is inconclusive, so state. f (
> Let f (x, y) = 10x2/5y3/5. Show that f (3a, 3b) = 3f (a, b).
> Let f (x, y) = x2 - 3xy - y2. Compute f (5, 0), f (5,-2), and f (a, b).
> The velocity of a skydiver at time t seconds is υ(t) = 45 - 45e-0.2t meters per second. Find the distance traveled by the skydiver the first 9 seconds.
> The velocity at time t seconds of a ball thrown up into the air is υ(t) = -32t + 75 feet per second. (a) Compute the displacement of the ball during the time interval 1 ≤ t ≤ 3. (b) Is the position of the ball at time t = 3 higher than its position at ti
> The velocity at time t seconds of a ball thrown up into the air is υ(t) = -32t + 75 feet per second. (a) Find the displacement of the ball during the time interval 0 ≤ t ≤ 3. (b) Given that the initial position of the ball is s(0) = 6 feet, use (a) to de
> A rock is dropped from the top of a 400-foot cliff. Its velocity at time t seconds is υ(t) = -32t feet per second. Find the displacement of the rock during the time interval 2 ≤ t ≤ 4.
> Refer to Fig. 7 and evaluate -1∫2 f (t)dt. Figure 7: 0 f(t) y=t-1 S || =²-1 2
> Refer to Fig. 6 and evaluate -1∫1 f (t)dt. Figure 6: I 7-1=k 0 I- 7+T=; DL
> Refer to Fig. 5 and evaluate 0∫3 f (x)dx. Figure 5: y y¹ 0 y=1-x² y = (1-x)(x − 3) 3 8 -
> Refer to Fig. 4 and evaluate 0∫2 f (x)dx. Figure 4: 2 4 0 ม y 1 บ y=r T
> Use formula (8) to help you answer the question. Given f (t) = -12t – 1/et, compute f (3) - f (0). Formula (8): [ F'(x)dx= F(b) - F(a).
> Use formula (8) to help you answer the question. Given f ‘(t) = -.5t + e-2t, compute f (1) - f (-1). Formula (8): [ F'(x)dx= F(b) - F(a).
> Determine the following: ∫7 dx
> Use formula (8) to help you answer the question. Given f ‘(x) = 73, compute f (4) - f (2). Formula (8): [ F'(x)dx= F(b) - F(a).
> Use formula (8) to help you answer the question. Given f ‘(x) = -2x + 3, compute f (3) - f (1). Formula (8): [ F'(x)dx= F(b) - F(a).
> Combine the integrals into one integral, then evaluate the integral. 0∫1 (7x + 4) dx + 1∫2 (7x + 5) dx
> Combine the integrals into one integral, then evaluate the integral. -1∫0 (x3 + x2) dx + 0∫1 (x3 + x2) dx
> Combine the integrals into one integral, then evaluate the integral. 0∫1 (4x - 2) dx + 3 0∫1 (x - 1) dx
> Combine the integrals into one integral, then evaluate the integral. 2 1∫2 (3x + 1/2 x2 - x3) dx + 3 1∫2 (x2 - 2x + 7) dx
> Given -0.5∫3 f (x)dx = 0 and -0.5∫3 (2g(x) + f (x))dx = -4, find -0.5∫3 g(x)dx.
> Given 1∫3f (x)dx = 3 and 1∫3 g(x)dx = -1, find 1∫3 (2f (x) - 3g(x)) dx.
> Given -1∫1 f (x)dx = 0 and -1∫10 f (x)dx = 4, find 1∫10 f (x)dx.
> Given 0∫1 f (x)dx = 3.5 and 1∫4 f (x)dx = 5, find 0∫4 f (x)dx.
> Determine the following: ∫x/3 dx
> Evaluate the given integral. 0∫ln 2 (ex + e-x)/2 dx
> Evaluate the given integral. 0∫1 (ex + e0.5x)/e2x dx
> Evaluate the given integral. -2∫-1 (1 + x)/x dx
> Evaluate the given integral. 1∫2 2/x dx
> Evaluate the given integral. -2∫2 2/e2t dt
> Evaluate the given integral. -1∫0 (3e3t + t) dt
> Evaluate the given integral. 1∫4 (x2 - √x)/x dx
> Evaluate the given integral. 1∫2 (5 - 2x3)/x6 dx
> Evaluate the given integral. 1∫8 (-x + 3√x) dx
> Evaluate the given integral. 1∫2 -3/x2 dx
> Determine the following: ∫4x3 dx
> Evaluate the given integral. 1∫9 1/√x dx
> Plot the graph of the solution of the differential equation y = e-x2, y(0) = 0. Observe that the graph approaches the value √π/2 ≈ .9 as x increases.
> Find an antiderivative of f (x), call it F (x), and compare the graphs of F (x) and f (x) in the given window to check that the expression for F (x) is reasonable. [That is, determine whether the two graphs are consistent. When F (x) has a relative extre
> Find an antiderivative of f (x), call it F (x), and compare the graphs of F (x) and f (x) in the given window to check that the expression for F (x) is reasonable. [That is, determine whether the two graphs are consistent. When F (x) has a relative extre
> Drilling of an oil well has a fixed cost of $10,000 and a marginal cost of C ‘(x) = 1000 + 50x dollars per foot, where x is the depth in feet. Find the expression for C(x), the total cost of drilling x feet.
> Since 1987, the rate of production of natural gas in the United States has been approximately R(t) quadrillion British thermal units per year at time t, with t = 0 corresponding to 1987 and R(t) = 17.04e0.016t. Find a formula for the total U.S. productio
> The United States has been consuming iron ore at the rate of R(t) million metric tons per year at time t, where t = 0 corresponds to 1980 and R(t) = 94e0.016t. Find a formula for the total U.S. consumption of iron ore from 1980 until time t.
> A soap manufacturer estimates that its marginal cost of producing soap powder is C ‘ (x) = .2x + 100 dollars per ton at a production level of x tons per day. Fixed costs are $200 per day. Find the cost of producing x tons of soap powder per day.
> A small tie shop finds that at a sales level of x ties per day, its marginal profit is MP(x) dollars per tie, where MP(x) = 1.30 + .06x - .0018x2. Also, the shop will lose $95 per day at a sales level of x = 0. Find the profit from operating the shop at
> A flu epidemic hits a town. Let P(t) be the number of persons sick with the flu at time t, where time is measured in days from the beginning of the epidemic and P(0) = 100. After t days, if the flu is spreading at the rate of P ‘ (t) = 120t - 3t2 people
> Find all antiderivatives of each following function: f (x) = -4x
> After t hours of operation, a coal mine is producing coal at the rate of C ’ (t) = 40 + 2t – 1/5 t2 tons of coal per hour. Find a formula for the total output of the coal mine after t hours of operation.
> Let P(t) be the total output of a factory assembly line after t hours of work. If the rate of production at time t is P’ (t) = 60 + 2t – 1/4t2 units per hour, find the formula for P(t).
> A rock is dropped from the top of a 400-foot cliff. Its velocity at time t seconds is y(t) = -32t feet per second. (a) Find s(t), the height of the rock above the ground at time t. (b) How long will the rock take to reach the ground? (c) What will be its
> A ball is thrown upward from a height of 256 feet above the ground, with an initial velocity of 96 feet per second. From physics it is known that the velocity at time t is y(t) = 96 - 32t feet per second. (a) Find s(t), the function giving the height abo
> The function g(x) in Fig. 9 resulted from shifting the graph of f (x) up 2 units. What is the derivative of h(x) = g(x) - f (x)? Figure 9: Y + 2 y = g(x) y = f(x) X
> The function g(x) in Fig. 8 resulted from shifting the graph of f (x) up 3 units. If f ‘(5) = 1/4 , what is g(5)? Figure 8: 3 ↓ 5 y = g(x) y = f(x) x
> Figure 7 contains an antiderivative of the function f (x). Draw the graph of another antiderivative of f (x). Figure 7: TH Y [T I
> Figure 6 contains the graph of a function F (x). On the same coordinate system, draw the graph of the function G(x) having the properties G (0) = 0 and G ’(x) = F ‘(x) for each x. Figure 6: 2 -2 y H 4 y = F(x) 8
> Which of the following is ∫x√(x + 1) dx? (a) 2/5 (x + 1)5/2 – 2/3 (x + 1)3/2 + C (b) ½ x2 * 2/3 (x + 1)3/2 + C
> Find all antiderivatives of each following function: f (x) = 3
> Which of the following is ∫ln x dx? (a) 1/x + C (b) x * ln x - x + C (c) ½ * (ln x)2 + C
> Figure 5 shows the graphs of several functions f (x) for which f ‘(x) = 1/3. Find the expression for the function f (x) whose graph passes through (6, 3). Figure 5: ∞ 6 4 Y + 2 (6,3) 6 8 8 10 -x 12
> Figure 4 shows the graphs of several functions f (x) for which f (x) = 2/x. Find the expression for the function f ‘(x) whose graph passes through (1, 2). Figure 4: (1, 2) 6 4 2 y -2. -4- 4 6 + 8 | | | 10 12 X
> Find all functions f (x) that satisfy the given conditions. f ‘(x) = x2 + √x, f (1) = 3
> Find all functions f (x) that satisfy the given conditions. f ‘(x) = √x + 1, f (4) = 0
> Find all functions f (x) that satisfy the given conditions. f ‘ (x) = 8x1/3, f (1) = 4
> Find all functions f (x) that satisfy the given conditions. f ‘(x) = x, f (0) = 3
> Find all functions f (x) that satisfy the given conditions. f ‘(x) = 2x - e-x, f (0) = 1
> Find all functions f (x) that satisfy the given conditions. f ‘(x) = .5e-0.2x, f (0) = 0
> Find all functions f (t) that satisfy the given condition. f ‘(t) = t2 - 5t - 7
> Find all antiderivatives of each following function: f (x) = e-3x
> Find all functions f (t) that satisfy the given condition. f ‘(t) = 0
> Find all functions f (t) that satisfy the given condition. f ‘(t) = 4/(6 + t)
> Find all functions f (t) that satisfy the given condition. f ‘(t) = t3/2
> Find the value of k that makes the antidifferentiation formula true. ∫5/(2 - 3x) dx = k ln |2 - 3x| + C
> Find the value of k that makes the antidifferentiation formula true. ∫3/(2 + x) dx = k ln |2 + x| + C
> Calculate the following integrals. ∫ (x3 + 3x2 - 1)dx
> Calculate the following integrals. ∫ 2/(x + 4) dx
> Calculate the following integrals. ∫ 2x + 1 dx
> Calculate the following integrals. ∫ (x2 - 3x + 2) dx
> Calculate the following integrals. ∫32 dx
> Generalize the result of Exercise 73 as follows: Let n be a positive integer. Show that 0∫1 (n√x – xn) dx = (n-1)/(n+1).
> Find the value of k that makes the antidifferentiation formula true. ∫ (2x - 1)3 dx = k(2x - 1)4 + C
> Show that 0∫1 (√x - x2) dx = 1/3.
> Generalize the result of Exercise 71 as follows: Let n be a positive integer. Show that for any positive number b we have 0∫bn n√x dx + 0∫b xn dx = bn+1
> Show that for any positive number b we have 0∫b2 √x dx + 0∫b x2 dx = b3
> For what value of a is the shaded area in Fig. 4 equal to 1? Figure 4: y = r ย 0 D a, a
> Find a function f (x) whose graph goes through the point (1, 1) and whose slope at any point (x, f (x)) is 3x2 - 2x + 1.
> If money is deposited steadily in a savings account at the rate of $4500 per year, determine the balance at the end of 1 year if the account pays 9% interest compounded continuously.
> The annual world rate of water use t years after 1960, for t ≤ 35, was approximately 860 e0.04t cubic kilometers per year. How much water was used between 1960 and 1995?
> Suppose that water is flowing into a tank at a rate of r (t) gallons per hour, where the rate depends on the time t according to the formula r (t) = 20 - 4t, 0 ≤ t ≤ 5. (a) Consider a brief period of time, say, from t1 to t2. The length of this time peri
> True or false: If 3 ≤ f (x) ≤ 4 whenever 0 ≤ x ≤ 5, then 3 ≤ 1/5 0∫5 f (x) dx ≤ 4.
> In Fig. 3, the rectangle has the same area as the region under the graph of f (x). What is the average value of f (x) on the interval 2 ≤ x ≤ 6? Figure 3: fi 0 2 6 x y 0 y = f(x) 2 6
> Find the value of k that makes the antidifferentiation formula true. ∫ (3x + 2)4 dx = k(3x + 2)5 + C
> What number does the sum [13 + (1 + 1/n)3 + (1 + 2/n)3+ (1 + 3/n)3+ … + (1 + n-1/n)3] * 1/n approach as n gets very large?
> What number does [e0 + e1/n + e2/n + e3/n + … + e(n-1)/n] * 1/n approach as n gets very large?
> Suppose that the interval 0 ≤ t ≤ 3 is divided into 1000 subintervals of width Δt. Let t1, t2, … , t1000 denote the right endpoints of these subintervals. If we need to estimate the
> For each number x satisfying -1 … x … 1, define h(x) by h(x) = -1∫x √ (1 - t2) dt. (a) Give a geometric interpretation of the values h(0) and h(1). (b) Find the derivative h ‘(x).
> Let x be any positive number, and define g(x) to be the number determined by the definite integral g(x) = 0∫x 1/(1 + t2) dt. (a) Give a geometric interpretation of the number g(3). (b) Find the derivative g ‘ (x).
> A retail store sells a certain product at the rate of g(t) units per week at time t, where g(t) = rt. At time t = 0, the store has Q units of the product in inventory. (a) Find a formula f (t) for the amount of product in inventory at time t. (b) Determi
> A store has an inventory of Q units of a certain product at time t = 0. The store sells the product at the steady rate of Q/A units per week and exhausts the inventory in A weeks. (a) Find a formula f (t) for the amount of product in inventory at time t.
