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- Reminder Round all answers to two decimal places unless otherwise indicated. Looking over a Wall Twenty horizontal feet north of a 50-foot building is a 35-foot wall see Figure 3.22). A man 6 feet tall wishes to view the top of the building from the north side of the wall. How far north of the wall must he stand in order to view the top if the building?arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. The Rock with a Changed Reference Point Make graphs of position and velocity for a rock tossed upward from ground level as it might be viewed by someone standing atop a tall building. Thus, the location of the rock is measured by its distance down from the top of the building.arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. Walking and Running You live east of campus, and you are walking from campus toward your home at a constant speed. When you get there, you rest for 5minutes and then run back west at a rapid speed. After a few minutes, you reach your destination, and then you rest for 10minutes. Measure your location as your distance west of your home, and make graphs of your location and velocity.arrow_forward
- Reminder Round all answers to two decimals places unless otherwise indicated. A Topographical Map In making a topographical map, it is not practical to measure the heights of structures such as mountains directly. This exercise illustrates how some such measurements are taken. A surveyor whose eye is 6 feet above the ground views a mountain peak that is 2 horizontal miles distant. See Figure 3.15 on the next page. Directly in his line of sight is the top of a surveying pole that is 10 horizontal feet distant and 8 feet high. How tall is the mountain peak? Note: One mile is 5280 feet.arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. A Wrap Skirt Figure 3.13 shows a simplified pattern for a wrap skirt that is 20 inches long. The bottom hem for this pattern has a length of 63 inches. Suppose you decide to alter the pattern to make a skirt that is 24 inches long. What should be the length of the bottom hem?arrow_forwardReminder Round all answers to two decimals places unless otherwise indicated. An Overflow Pipeline An overflow pipeline for a pond is to run in a straight line from the pond at maximum water level a distance of 96 horizontal feet to a drainage area that is 5 vertical feet below the maximum water level see Figure 3.21. How much lower is the pipe at the end of each 12-foot horizontal stretch?arrow_forward
- Reminder Round all answer to two decimal places unless otherwise indicated. Hair Growth When you are 18 years old you have a hair that is 14 centimeters long, and your hair grows about 12 centimeters each year. Let H(t) be the length, in centimeters, of that hair t years after age 18. a. Find a formula that gives H as a linear function of t. b. How long will it take for the hair to reach a length of 90 centimeters?arrow_forwardReminderRound all answers to two decimal places unless otherwise indicated. Falling with a parachuteWhen an average-sized man with a parachute jumps from an airplane, he will fall S=12.5(0.2t1)+20t feet in t seconds. a.Plot the graph of S versus t over at least the first 10seconds of the fall. b.How far does the parachutist fall in 2seconds? c.Calculate dSdt at 2seconds into the fall and explain what the number you calculated means in practical terms.arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. The Rock with a Formula If from ground level we toss a rock upward with a velocity of 30feetpersecond, we can use elementary physics to show that the height in feet of the rock above the ground t seconds after the toss is given by S=30t16t2. a. Use your calculator to plot the graph of S versus t. b. How high does the rock go? c. When does it strike the ground? d. Sketch the graph of the velocity of the rock versus time.arrow_forward
- Reminder Round all answers to two decimal places unless otherwise indicated. Bores Under certain conditions, tsunami waves encountering land will develop into bores. A bore is a surge of water much like what would be expected if a dam failed suddenly and emptied a reservoir in to a river bed. In the case of a bore travelling from the ocean into a dry river bed, one study shows that the velocity V of the tip of the bore is proportional to the square root of its height h. Expressed in a formula, this is V=kh0.5, where k is a constant. a.A bore travels up a dry river bed. How does the velocity of the tip compare with its initial velocity when its height is reduced to half of its initial height? b.How does the height of the bore compare with its initial height when the velocity of the tip is reduced to half of its initial velocity? c.If the tip of one bore surging up a dry river bed is three times the height of another, how do their velocities compare?arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. Gravity on Earth and on MarsThe acceleration due to gravity near the surface of a planet depends on the mass of the planet; larger planets impart greater acceleration than smaller ones. Mars is much smaller than Earth. A rock is dropped from the top of a cliff on each planet. Give its location as the distance down from the top of the cliff. a.On the same coordinate axes, make a graph of distance down for each of the rocks. b.On the same coordinate axes, make a graph of velocity for each of the rocks.arrow_forwardReminder Round all the answers to two decimal places unless otherwise indicated. A Leaking Can The side of a cylindrical can full of water springs a leak, and the water begins to stream out. See Figure 5.73. The depth H, in inches, of water remaining in the can is a function of the distance D in inches measured from the base of the can at which the stream of water strikes the ground. Here is a table of values of D and H: Distance D, in inches Depth H, in inches 0 1.00 1 1.25 2 2.00 3 3.25 4 5.00 a. Use regression to find a formula for H as a quadratic function of D. b. When the depth is 4 inches, how far from the base of the can will the water stream strike the ground? c. When the water stream strikes the ground 5 inches from the base of the can, what is the depth of water in the can?arrow_forward
- Functions and Change: A Modeling Approach to Coll...AlgebraISBN:9781337111348Author:Bruce Crauder, Benny Evans, Alan NoellPublisher:Cengage Learning