19th Edition

ISBN: 9780998625720

Author: Lynn Marecek

Publisher: OpenStax College

Concept explainers

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 …

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 experime…

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Textbook Question

Chapter 4, Problem 420PT

In the following exercises, translate to a system of equations and solve.

420. The manufacturer of a granola bar spends $1.20 to make each bar and sells them for $2. The manufacturer also has fixed costs each month of $8,000.

(a) Find the cost function C when x granola bars are manufactured

(b) Find the revenue function R when x granola bars are sold.

(d) Find the break-even point. Interpret what the break-even point means.

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Chapter 4, Problem 419PT

Chapter 4, Problem 421PT

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A trader ordered x number of pen drives for GH¢48,000.00. She found that 40 of themwere defective after taking deliveries of the items. She then sold all the remaining pendrives. The selling price of one pen drive was GH¢100.00 more than the cost price.Find in terms of x ;(i) the cost price of one pen drive(ii) the number of pen drives she sold(iii) the selling price of one pen drive(iv) an expression for the total sum that she received from the saleb) If she made a profit of GH¢12,000.00 from the sales, Find;(i) the number of pen drives she originally bought(ii) the cost price for a pen drive.c) This same trader has decided to set up a sinking fund for purchasing atruck in 2 years. It is expected that the truck will cost GH¢30,000. If the fundearns 10% interest per year compounded quarterly, determine the size of each (equal)quarterly instalment the trader should pay into the fund.

A trader ordered x number of pen drives for GH¢48,000.00. She found that 40 of themwere defective after taking deliveries of the items. She then sold all the remaining pendrives. The selling price of one pen drive was GH¢100.00 more than the cost price.Find in terms of x ;(i) the cost price of one pen drive(ii) the number of pen drives she sold(iii) the selling price of one pen drive(iv) an expression for the total sum that she received from the saleb) If she made a profit of GH¢12,000.00 from the sales, Find;(i) the number of pen drives she originally bought(ii) the cost price for a pen drive.c) This same trader has decided to set up a sinking fund for the purpose of purchasing atruck in 2 years’ time. It is expected that the truck will cost GH¢30,000. If the fundearns 10% interest per year compounded quarterly, determine the size of each (equal)quarterly installment the trader should pay into the fund. Please help me with part (c).......Thanks

A trader ordered x number of pen drives for GH¢48,000.00. She found that 40 of them were defective after taking deliveries of the items. She then sold all the remaining pendrives. The selling price of one pen drive was GH¢100.00 more than the cost price.Find in terms of x ; (i) the cost price of one pen drive(ii) the number of pen drives she sold(iii) the selling price of one pen drive(iv) an expression for the total sum that she received from the saleb) If she made a profit of GH¢12,000.00 from the sales, Find;(i) the number of pen drives she originally bought(ii) the cost price for a pen drive.c) This same trader has decided to set up a sinking fund for the purpose of purchasing a truck in 2 years’ time. It is expected that the truck will cost GH¢30,000. If the fund earns 10% interest per year compounded quarterly, determine the size of each (equal) quarterly installment the trader should pay into the fund.

Chapter 4 Solutions

Intermediate Algebra

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