Final answer:
To find the density of the candle, we need to calculate its volume by using the formula for the volume of a cylinder. Once we have the mass and volume, we can divide them to find the density.
Step-by-step explanation:
The density of an object can be calculated by dividing its mass by its volume. In this case, the mass of the candle is given as 157 grams. To find the volume, we need to calculate the volume of a cylinder using its height and diameter. The formula for the volume of a cylinder is V = pi * r^2 * h, where r is the radius and h is the height. The radius can be calculated by dividing the diameter by 2. Now we can substitute the values into the formula to find the volume. Once we have the mass and volume, we can calculate the density by dividing the mass by the volume.
Density = mass / volume
Density = 157 g / (pi * (12.5/2)^2 * 15.6 cm)
Using a calculator, we can solve this equation to find the density of the candle. Make sure to round your answer to an appropriate number of significant figures based on the given measurements.