If the speed limit on a highway is 100 km h^-1, what is the speed limit in m h^-1? A) 1 × 10⁷ m h^-1 B) 0.1 m h^-1 C) 1 × 10³ m h^-1 D) 1 × 10⁵ m h^-1 E) 1 × 10¹ m h^-1

Question

Quizplus · Accepted Answer

To convert km/h to m/h, we need to multiply by 1000/3600, which simplifies to 5/18. Therefore, the speed limit in m/h is:
100 km/h x 5/18 = 27.78 m/h
However, the options are given in scientific notation, so we need to convert 27.78 to scientific notation. Moving the decimal point 1 place to the right gives 2.778 and we need to multiply this by 10 to the power of 15 to get to the desired unit (m/h). Therefore, the answer is:
1 × 10^15 m/h

If the Speed Limit on a Highway Is 100 Km