Points A and B are opposite each other on shores of a straight river 3km wide. Point C is on the same shore as B but 2km down the river from B. A telephone company wishes to lay a cable from A to C. If the cost per kilometer of the cable is 25% more under the water than it is on land, what line of cable would be least expensive for the company? (Let c dollars be the cost per kilometer on land.)
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Points A and B are opposite each other on shores of a straight river 3km wide. Point C is on the same shore as B but 2km down the river from B. A telephone company wishes to lay a cable from A to C. If the cost per kilometer of the cable is 25% more under the water than it is on land, what line of cable would
be least expensive for the company? (Let c dollars be the cost per kilometer on land.)
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