91Ó°ÊÓ

Solve each problem. (Assume that all items are equally priced.) (In Exercises 53–56, round answers to the nearest tenth.) Four tires cost \(\$ 398.00 .\) How much do 7 tires cost?

Solve each problem. A triangle is such that its medium side is twice as long as its shortest side and its longest side is 7 yd less than three times its shortest side. The perimeter of the triangle is 47 yd. What are the lengths of the three sides?

Use a formula to solve each problem. A prehistoric ceremonial site dating to about 3000 B.C. was discovered in south-western England. The site is a nearly perfect circle, consisting of nine concentric rings that probably held upright wooden posts. Around this timber temple is a wide, encircling ditch enclosing an area with a diameter of 443 ft. Find this enclosed area to the nearest thousand square feet. (Hint: Find the radius. Then use \(\left.\mathscr{A}=\pi r^{2} \cdot\right)(\text {Source}: \text {Archaeology}, \text { vol. } 51\) no. \(1, \text { Jan. } / \text { Feb. } 1998 .)\)

Solve each problem. (Assume that all items are equally priced.) (In Exercises 53–56, round answers to the nearest tenth.) If 9 pairs of jeans cost \(\$ 121.50,\) find the cost of 5 pairs.

Use a formula to solve each problem. The world's largest sand painting was created by Buddhist monks in the Singapore Expo Hall in May 2004 The painting measured \(12.24 \mathrm{m}\) by \(12.24 \mathrm{m} .\) What was the perimeter of the sand painting? To the nearest hundredth of a square meter, what was the area?

Solve each problem. (Assume that all items are equally priced.) (In Exercises 53–56, round answers to the nearest tenth.) If sales tax on a \(\$ 16.00 \mathrm{DVD}\) is \(\$ 1.32\), find the sales tax on a \(\$ 120.00 \mathrm{DVD}\) player.

Solve each problem. A store has 39 qt of milk, some in pint cartons and some in quart cartons. There are six times as many quart cartons as pint cartons. How many quart cartons are there? (Hint: \(1 \mathrm{qt}=2 \mathrm{pt})\)

Solve each problem. A table is three times as long as it is wide. If it were \(3 \mathrm{ft}\) shorter and 3 ft wider, it would be square (with all sides equal). How long and how wide is the table?

The world's largest sandwich, made by Wild Woody's Chill and Grill in Roseville, Michigan, was 12 ft long, \(12 \mathrm{ft}\) wide, and \(17 \frac{1}{2}\) in. \(\left(1 \frac{11}{24} \mathrm{ft}\right)\) thick. What was the volume of the sandwich?

The euro is the common currency used by most European countries, including Italy. On August \(15,2009,\) the exchange rate between euros and U.S. dollars was 1 euro to \(\$ 1.4294\) Ashley went to Rome and exchanged her U.S. currency for euros, receiving 300 euros. How much in U.S. dollars did she exchange?