91Ó°ÊÓ

For Problems 43-54, solve each formula for the indicated variable. (Before doing these problems, cover the right-hand column and see how many of these formulas you recognize!) (Objective 2) $$ V=\frac{1}{3} \pi r^{2} h \text { for } h $$

A retailer buys an item for \(\$ 40\), resells it for \(\$ 50\), and claims that she is making only a \(20 \%\) frofit. Is her claim comect?

Answer the question by setting up and solving an appropriate equation. What is \(7 \%\) of 38 ?

A store has a special discount sale of \(40 \%\) off on all items. It also advertises an additional \(10 \%\) off on items bought in quantities of a dozen or more. How much will it cost to buy a dozen atems of some particular kind that regularly sell for \(\$ 5\) per item? (Be careful, a 40)s discount followed by a \(10 \%\) discount is not equal to a \(50 \%\) discount.)

Answer the question by setting up and solving an appropriate equation. What is \(35 \%\) of 52 ?

For Problems 43-54, solve each formula for the indicated variable. (Before doing these problems, cover the right-hand column and see how many of these formulas you recognize!) (Objective 2) $$ i=\operatorname{Prt} \text { for } t $$

Answer the question by setting up and solving an appropriate equation. \(15 \%\) of what number is \(6.3\) ?

Is a \(10 \%\) discount followed by a \(40 \%\) discount the same as a \(40 \%\) discount followed by a \(10 \%\) discount? Justify your answer.

For Problems 43-54, solve each formula for the indicated variable. (Before doing these problems, cover the right-hand column and see how many of these formulas you recognize!) (Objective 2) $$ \mathrm{F}=\frac{9}{5} \mathrm{C}+32 \text { for } \mathrm{C} $$

For Problems 43-54, solve each formula for the indicated variable. (Before doing these problems, cover the right-hand column and see how many of these formulas you recognize!) (Objective 2) $$ A=P+\operatorname{Prt} \text { for } t $$