Wheelrite, a small company that manufactures garden wheelbarrows, has over- head expenses of $30 000 per year. In addition, it costs $40 to manufacture each wheelbarrow. a Write a rule which determines the total cost, $C, of manufacturing x wheelbarrows per year. b If the annual production is 6000 wheelbarrows, what is the overall cost per wheelbarrow? c How many wheelbarrows must be made so that the overall cost is $46 per wheelbarrow? d Wheelrite sells wheelbarrows to retailers for $80 each. Write a rule which determines the revenue, $R, from the sale of x wheelbarrows to retailers. e Sketch the graphs for C and R against x on the same axes. f What is the minimum number of wheelbarrows that must be produced for Wheelrite to make a profit each year? g Write a rule which determines the profit, $P, from the manufacture and sale of x number of wheelbarrows.
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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