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? (5 points)
1.5
2
10
15
To find how many times longer the blue whale is than the otter, we divide the length of the blue whale by the length of the otter:
3 x 10^4 mm / 2 x 10^3 mm = 15
Therefore, the blue whale is 15 times longer than the otter.