3. You need to rent a car and compare the charges of three different companies. Company A charges 20 cents per mile plus $20 per day. Company B charges 10 cents per mile plus $35 per day. Company C charges $70 per day with no mileage charge. Find formulas for the cost of driving cars rented from companies A, B, and C, in terms of x, the distance driven in miles in one day. b. Interpret the slopes and vertical intercepts of each function in economic terms. c. Graph the functions on your calculator. What is an appropriate viewing window (give xmin, xmax, ymin, and ymax)? d. Use your graphs in part c) to find under what circumstances Company A is cheapest. Use interval notation to express your answer. What about Company B? Company C? Explain why your results make sense. а.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
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