Correct Answer: B

Rationale:
To solve this equation, follow the order of operations (PEMDAS/BODMAS): First, perform multiplication and division from left to right. 3 4 equals 12, and 6 / 2 equals 3.
Then, carry out addition and subtraction from left to right. 5 + 12 - 3 equals 14, not 9.
Therefore, the correct answer is 14, making choice B the correct answer.

Choices A, C, and D can be eliminated as they do not match the correct result obtained by following the order of operations.

Correct Answer: B

Rationale: ollow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)):

Multiply: 7 3 = 21, and 4 2 = 8
Perform addition and subtraction: 6 + 21 - 8 = 19
Thus, the simplified expression equals 19.

Correct Answer: D

Rationale:
To find the sale price after a 30% discount, you first calculate the discount amount which is 30% of $472. 30% of $472 is $141.60.
To find the sale price, you subtract the discount amount from the original price: $472 - $141.60 = $330.40.
Therefore, the sale price of the television after a 30% discount would be $330.40.

Choices A, B, and C are incorrect as they do not accurately reflect the calculated sale price after the discount.

Correct Answer: A

Rationale: The correct answer is A: 7:1.
To find the ratio, divide the number of students with brown eyes (14) by the number of students with green eyes (2), which equals 7.
Therefore, the ratio of students with brown eyes to students with green eyes is 7:1.
Choice B (7:2) is incorrect as it does not accurately represent the ratio of students with brown eyes to green eyes.
Choice C (14:2) is incorrect because the ratio should be simplified, and 14:2 simplifies to 7:1.
Choice D (14:1) is incorrect as it does not consider the number of students with green eyes.

Correct Answer: B

Rationale: Histograms are specifically designed to display the frequency distribution of continuous data, showing the distribution of values over intervals or bins. On the other hand, bar graphs are used to compare different categories or discrete data points.
Therefore, the correct answer is B.

Choices A, C, and D are incorrect because histograms are not primarily used for comparing categories, percentages, or proportions, but rather for visualizing the distribution of frequencies within data intervals.