可汗
35.A tennis club is organizing group lessons. The club supplies 40 new balls for each player which cost $1 each. Each player pays $300 for the lessons. The club must pay each instructor $1,000 for conducting the lessons, and there must be at least 1 instructor for every 6 players. Which amount of players and instructors meets these requirements and still gives the club a net profit?
A. 6 players and 2 instructors
B. 10 players and 3 instructors
C. 13 players and 2 instructors
D. 16 players and 3 instructors
CORRECT ANSWER: D DIFFICULTY LEVEL: 4
39.A used car dealer has 20 vehicles, all cars and trucks. He would like to paint and clear coat as many of them as possible with the 260 liters of paint and 300 liters of clear coat that he has. It takes 13.2 liters of paint and 9.5 liters of clear coat for one car. It takes 1.5 times those amounts for one truck. Given the relevant equations graphed at left, which of the following could be the amount of cars and trucks that received paint and clear coat?
40.Some zoo monkeys are on a diet of fruit and nuts. Fruit has about 13.3 grams (g) of sugar per cup and 1.36g of protein per cup. Nuts have about 4.04g of sugar per cup and 15.56g of protein per cup. Each monkey must get between 70g and 90g of sugar per day and at least 85g of protein per day. Which of the following daily diets fits the monkeys' needs?
A. 0 cups of fruit and 16 cups of nuts
B. 4 cups of fruit and 8 cups of nuts
C. 8 cups of fruit and 4 cups of nuts
D.16 cups of fruit and 0 cups of nuts
CORRECT ANSWER: B DIFFICULTY LEVEL: 4
