During this period, the selling price of a coat was
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Chapter 3 Solutions
Mathematical Applications for the Management, Life, and Social Sciences
- Satellite Television: Two competing companies offer satellite television to a city with 100,000 households. Gold Satellite System has 25,000 subscribers and Galaxy Satellite Network has 30,000 subscribers. (The other 45,000 households do not subscribe.) The matrix shows the percent changes in satellite subscriptions each year. FromGoldFromGalaxyFromNon-subscriberPercentChangesPercentChanges{ ToGoldToGalaxyToNonsubscriber [ 0.700.150.150.200.800.150.100.050.70 ] (a) Find the number of subscribers each company will have in 1 year using matrix multiplication. Explain how you obtained your answer. (b) Find the number of subscribers each company will have in 2 years using matrix multiplication. Explain how you obtained your answer. (c) Find the number of subscribers each company will have in 3 years using matrix multiplication. Explain how you obtained your answer. (d) What is happening to the number of subscribers to each company? What is happening to the number of nonsubscribers?arrow_forwardGasoline Sales Matrix A shows the numbers of gallons of 87 octane, 89 octane, and 93 octane gasoline sold at a convenience store over a weekend. 878993OctaneA=[5808403205604201608601020540]FridaySaturdaySunday Matrix B gives the selling prices in dollars per gallon and the profits in dollars per gallon for the three grades of gasoline. SellingpriceProfitB=[b110.05b210.08b310.10]878993}Octane (a) Find AB and interpret the result. (b) Find the convenience stores profit from gasoline sales for the weekend.arrow_forwardHOW DO YOU SEE IT? A corporation has three factories that manufacture acoustic guitars and electric guitars. The production levels are represented by A. ABCFactoryA=7050253510070AcousticElectricGuitartype (a) Interpret the value of a22. (b) How could you find the production levels when production increases by 20% ? (c) Each acoustic guitar sells for $80 and each electric guitar sells for $120. How could you use matrices to find the total sales value of the guitars produced at each factory?arrow_forward
- Profit: At a local store, the numbers of gallons of skim milk, 2% milk, and whole milk sold over the weekend are represented by A. Skim2%WholemilkmilkmilkA=406452608276769684FridaySaturdaySunday The selling prices per gallon and the profits per gallon for the three types of milk are represented by B. SellingProfitProfitB=$3.45$1.20$3.65$1.30$3.85$1.45Skimmilk2%milkWholemilk (a) Compute AB and interpret the result. (b) Find the store’s total profit from the milk sales for the weekend.arrow_forwardA factory manufactures three products (doohickies, gizmos, and widgets) and ships them to two warehouses for storage. The number of units of each product shipped to each warehouse is given by the matrix A=[20015010075100125] (where aij is the number of units of product i sent to warehouse j and the products are taken in alphabetical order). The cost of shipping one unit of each product by truck is $1.50 per doohickey, $1.00 per gizmo, and $2.00 per widget. The corresponding unit costs to ship by train are $1.75, $1.50, and $1.00. Organize these costs into a matrix B and then use matrix multiplication to show how the factory can compare the cost of shipping its products to each of the two warehouses by truck and by train.arrow_forward
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