### Home > INT1 > Chapter 3 > Lesson 3.1.3 > Problem3-35

3-35.

The Kitti’s hog-nosed bat, or bumblebee bat, is one of the world’s smallest mammals. It typically weighs about $2\times10^{−3}$ kilograms and has a $1.5\times10^{−1}$ meter wingspan. A giant golden-crowned flying fox bat, on the other hand, typically weighs $1.6$ kilograms and has a wingspan of up to $1.7$ meters. Estimate about how many times heavier a flying fox bat is than a bumblebee bat, without using a calculator.

Is the question about the mass (in kilograms) or the wingspan (in meters)?

This is about the mass (in kilograms).
So set up a ratio of the mass of the flying fox to the bumblebee bat.

$\frac{1.6\text{ kilograms}}{2 \text{ x } 10^{-3}\text{ kilograms}}=800$