Question

a highway sign shows a speed limit of 60 miles per hour. which of the following car speed measurements represent the same level of accuracy compared to the speed limit sign? check all that apply.
a. 48 mph
b. 64 mph
c. 56 mph
d. 68 mph

Explanation:

Step1: Determine the place value of the given speed limit

The speed limit is \(60\) miles per hour. The number \(60\) is accurate to the tens place.

Step2: Analyze each option's place - value accuracy

• Option A: For \(48\) mph, the number \(48\) is accurate to the tens place (since \(48\) is in the form of \(a\times10 + b\) where \(a = 4\) and \(b=8\)).
• Option B: For \(64\) mph, the number \(64\) is accurate to the tens place (since \(64\) is in the form of \(a\times10 + b\) where \(a = 6\) and \(b = 4\)).
• Option C: For \(56\) mph, the number \(56\) is accurate to the tens place (since \(56\) is in the form of \(a\times10 + b\) where \(a=5\) and \(b = 6\)).
• Option D: For \(68\) mph, the number \(68\) is accurate to the tens place (since \(68\) is in the form of \(a\times10 + b\) where \(a = 6\) and \(b=8\)).

Answer:

A. \(48\) mph, B. \(64\) mph, C. \(56\) mph, D. \(68\) mph