Question

a newborn elephant typically stands 9 × 10⁻⁴ kilometers tall. which two units of measurement are most appropriate to use when discussing this height? select each correct answer. millimeters kilometers centimeters meters

Explanation:

Step1: Convert to meters

We know that 1 kilometer = 1000 meters. So, $9\times10^{- 4}$ kilometers is $9\times10^{-4}\times1000 = 0.9$ meters.

Step2: Convert to centimeters

Since 1 meter = 100 centimeters, 0.9 meters is $0.9\times100=90$ centimeters.

Step3: Convert to millimeters

As 1 centimeter = 10 millimeters, 90 centimeters is $90\times10 = 900$ millimeters.

The height of $9\times10^{-4}$ kilometers is 0.9 meters or 90 centimeters. Kilometers are too large a unit for this height and millimeters are too small - scale for a typical description of an elephant's height.

Answer:

C. centimeters, D. meters