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You have been asked to analyze the cost of creating applications for the ePhone and SmrtPhone. The cost, C (in dollars), for creating an application for the ePhone is given by the functioand be sure to show work on the steps for calculating:n C(x) = 4x + 92, and the cost for creating an application for the SmrtPhone is given by the function C(x) = 3x + 108, where x is the number of hours needed to complete the application.
• What is the cost for both the ePhone and SmrtPhone if 28 hours are used?
• If the cost of creating the application is $300, compare the hours that would be needed for the ePhone application versus the SmrtPhone.
a rock is dropped into a pond and causes a ripple, find the rate of the area of the ripple when the radius is 4.
How much work was done lifting the sand this far? (Neglect the weight of the bag and lifting equipment.)
Let A be the area under the graph of an increasing continuous function f from a to b, and let Ln and Rn be the approximations to A with n subintervals using left and right endpoints, respectively.
The maximum number of grams of fat that should be in a diet varies directly as a person's weight. A person weighing 120 lbs should have no more than 60g of fat per day. What is the maximum daily fat intake for a person weighing 180 lbs?
A plane flying at an altitude of 25,000 ft. has a defective airspeed indicator. To determine her speed, the pilot sights a fixed point on the ground. At the moment when the angle of depression
a motorboat can contain a constant speed of 38 mph relative to the water. the boat makes a trip upstream to a certain point in 42 minutes; the return trip is 34 minutes. what is the current?
A beam 4 inches wide, 6 inches deep, and 25 feet long can support a safe load of 576 pounds. Find the safe load for a beam that is of the same material but is 6 inches wide, 10 inches deep, and 20 feet long.
If you purchase a six-pack of sodas, and measure the amount in each can and find the average, the probability that the average of the six cans will be between 11.9 and 12.1 oz equals which standard normal probability?
The stopping distance D of a car after the brakes have been applied varies directly as the square of the speed s. A certain car traveling at 40 mi/h can stop in 136 ft. What is the maximum speed it can be traveling if it needs to stop in 160 ft? (..
A building 240 feet tall casts a 100 foot long shadow. If a person stands at the end of the shadow and looks up to the top of the building, what is the angle of the person's eyes to the top of the building (to the nearest hundredth of a degree)?
the cost to rent a construction crane is $630 a day plus $230 per hour of use. Write and solve an equation to determine how many hours the crane was renter for if the total cost is $3150.
A fence is to be built to enclose a rectangular area of 310 square feet. The fence along three sides is to be made of material that costs 5 dollars per foot
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