The measurement of all interior angles of any polygon is 360 degrees
Percent of change will always be positive because the change is an absolute value. As we know, absolute value is always a positive value because you don't pay attention to the direction, only the distance is important.
The equation for density is:

To help you remember - my teacher told us to remember "We <span>♡ density," and the heart stands for </span>

, or

. Cheesy, but it works!<span>
</span>
Back to the problem:We know the mass if 49g and the volume is 7

, so plug these values into the equation for density:
Answer: The density is 7 g/