Question

The length of a blue whale is approximately 3 × 104 millimeters; the length of an otter is 2 × 103 millimeters. How many times longer is the blue whale than the otter?

1.5 millimeters
 2 millimeters
 10 millimeters
 15 millimeters

Answer 1

15 mm

Explanation:

Answer 2

Answer: Last option is correct.

Explanation:

Since we have given that

Length of a blue whale is given by

`3* 10^4`

Length of an otter is given by

`2* 10^3`

Number of times the blue whale is longer than the otter is given by

`\frac{\text{Length of a blue whale}}{\text{ Length of an otter}}\\\\=(3* 10^4)/(2* 10^3)\\\\=(3* 10000)/(2* 1000)\\\\=(30)/(2)\\\\=15\ millimeters`

Hence, Last option is correct.