Question

neil makes candles to sell for a school fundraiser. he makes the candles out of wax that, once hardened, has a density of 0.9 grams per cubic centimeter. each candle has a volume of 140 cubic centimeters. neil sells the candles in sets of 5.
what is the total mass of one set of candles?
write your answer as a whole number or decimal rounded to the nearest tenth.
grams

Explanation:

Step1: Recall the formula for mass

The formula that relates density ($
ho$), mass ($m$), and volume ($V$) is $
ho=\frac{m}{V}$, which can be rearranged to $m =
ho\times V$.

Step2: Calculate the mass of one candle

We know the density of the wax $
ho = 0.9$ grams per cubic centimeter and the volume of one candle $V = 140$ cubic centimeters. Using the formula $m=
ho\times V$, the mass of one candle is $m = 0.9\times140$.
Calculating $0.9\times140$: $0.9\times140 = 126$ grams.

Step3: Calculate the mass of one set of candles

Neil sells the candles in sets of 5. So to find the total mass of one set, we multiply the mass of one candle by 5. That is $126\times5$.
Calculating $126\times5$: $126\times5=630$ grams.

Answer:

630