Correct Answer: D

Rationale:
To determine the breakeven point where Truck B becomes the better buy, we need to compare the total costs for both trucks. For Truck A:
Total cost = $450 + (miles / 25) * $4. For Truck B:
Total cost = $650 + (miles / 35) * $4.
To find the point where Truck B is the better buy, set the two total cost equations equal to each other and solve for miles. By solving this equation, we find that Sally must drive 4375 miles for Truck B to be the better buy.
Choice A (500) is too low,
Choice B (7500) is too high, and
Choice C (1750) does not represent the breakeven point where Truck B becomes more cost-effective.

Correct Answer: B

Rationale:
To convert decimeters to centimeters, you need to multiply by 10 since 1 decimeter is equal to 10 centimeters.
Therefore, to find the width of the book in centimeters, multiply 5 decimeters by 10: 5 decimeters * 10 = 50 centimeters. This means the width of the book is 50 centimeters, making choice B, "25 centimeters," the correct answer.

Choices A, C, and D are incorrect because they do not correctly convert decimeters to centimeters.

Correct Answer: B

Rationale: If the man chooses the financing plan, he pays $1000 as a down payment initially. Over the two-year period, he will be paying $120 per month for a total of 24 months, which amounts to $120 x 24 = $2880.
Therefore, the total amount he pays for the furniture through the financing plan is $1000 (down payment) + $2880 (monthly payments) = $3880. Comparing this total with the entire amount paid in one payment with cash would be $3880 - $3000 = $880 more. So, the man would pay $880 more if he chooses the financing plan.
Therefore, the correct answer is $1280 more, not $1480, $1600, or $2480. These amounts do not accurately represent the additional cost incurred by choosing the financing plan.

Correct Answer: A

Rationale:
To find the volume of a sphere, the formula V = (4/3)πr³ is used, where r is the radius of the sphere. Given that the diameter of the ball is 7 inches, the radius (r) would be half of the diameter, which is 3.5 inches. Plugging this value into the formula: V = (4/3)π(3.5)³ = (4/3)π(42.875) ≈ 165.7 in³.
Therefore, the correct answer is A.
Choice B, C, and D are incorrect as they do not accurately represent the volume of the ball with a diameter of 7 inches.

Correct Answer: C

Rationale: Out of all the patients who took the antibiotic, 30% developed an infection. Among those with infections, 5% required hospitalization.
To find the percentage of all patients hospitalized, we multiply the two percentages: 30% * 5% = 1.5%.
Therefore, 1.5% of all patients were hospitalized.
Choice A (1.50%) is the calculated percentage of all patients hospitalized, not 1.50%.
Choice B (5%) is the percentage of patients who developed an infection and required hospitalization, not all patients.
Choice D (30%) represents the initial percentage of patients who developed an infection, not the percentage hospitalized.