# SAT Math Multiple Choice Question 453: Answer and Explanation

### Test Information

Question: 453

3. The First Transcontinental Railroad, which was 1,907 miles long, was completed in 1869 to connect the West Coast of the United States to the existing rail system that ran from the Missouri River to the East Coast. During the early years after building the railroad, dangerous conditions and mechanical problems could delay the train significantly. For a person traveling from one end of the First Transcontinental Railroad to the other, which inequality represents all possible values of t, where t is the time it took to complete the journey, if the train traveled at an average speed of m miles per hour?

• A.
• B.
• C.
• D.

Explanation:

B

Difficulty: Easy

Category: Heart of Algebra / Inequalities

Strategic Advice: Use the formula Distance = rate × time and solve for time. Then, substitute the value given for distance, 1,907. Remember, m is the rate in this scenario.

Getting to the Answer: All of the inequality symbols are the same, so look for the inequality with the proper relationship among distance, rate, and time.

Choice (B) is correct.