Metric Conversions for TEAS 7

Correct Answer: B

Rationale: To convert kilometers to meters, you multiply by 1000 since 1 kilometer is equal to 1000 meters. Therefore, 345 kilometers x 1000 = 345,000 meters. Choice A is incorrect as it doesn't account for the conversion factor. Choice C is incorrect as it adds an extra zero. Choice D is incorrect as it adds two extra zeros. Choice B is the correct answer as it correctly converts 345 kilometers to meters by multiplying by 1000.

Correct Answer: C

Rationale: The correct answer is C: femto- (f) = 10^-12 meters. The prefix "femto-" represents 10^-15, not 10^-12. Therefore, choices A and D are incorrect. Choice B, nano- (n) = 10^-12, is incorrect as well because it actually represents 10^-9. The correct relationship is that femto- (f) corresponds to 10^-12 meters, making option C the right choice.

Correct Answer: A

Rationale: To convert 0.75 to a fraction, we write it as 75/100 and simplify to 3/4 by dividing both numerator and denominator by the greatest common divisor, which is 25. Choice A (3/4) is correct as it represents 0.75 in simplest form. Choices B, C, and D are incorrect because they do not equal 0.75 when converted to a fraction. Choice B (7/10) simplifies to 0.7, choice C (15/20) simplifies to 0.75 but is not in simplest form, and choice D (1/2) simplifies to 0.5.

Correct Answer: B

Rationale: To convert kilometers to meters, you multiply by 1000 since 1 kilometer is equal to 1000 meters. Therefore, 345 kilometers x 1000 = 345,000 meters. Choice A is incorrect as it doesn't account for the conversion factor. Choice C is incorrect as it adds an extra zero. Choice D is incorrect as it adds two extra zeros. Choice B is the correct answer as it correctly converts 345 kilometers to meters by multiplying by 1000.

Correct Answer: A

Rationale: To convert 0.07 to a fraction, we need to write it as 7/100 since 0.07 is equivalent to 7/100 in fraction form. The correct answer is A (7/100). Choice B (7/50) is incorrect because 0.07 is not equivalent to 7/50. Choice C (7/25) is incorrect as well since it does not represent 0.07. Choice D (7/10) is incorrect because 0.07 is not equal to 7/10. The closest fraction to 0.07 is 7/100, making it the correct answer.