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17. A cannonball made of iron has a volume of 115 cm^3. If iron has a density of 7.86 g/cm3,

what is the mass in grams of the cannonball?
O 14.6 g
0.01 kg
0.9 g
904 g

help i don't know the answer ​

User Tau
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2 Answers

4 votes

Answer:

the answer 32/43

Step-by-step explanation:

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three. Remember that proportionality is a constant relationship or ratio between different magnitudes.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other, the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:

a ⇒ b

c ⇒ x

So,

The direct rule of three is the rule applied in this case as follows: If the change in water level is 0.05 inches per hour, what is the change in water level after 24 hours?

change in water level=1.2 inches

To pass a decimal number to a fraction, you must:

Put the decimal number in a fraction above a 1. That is, the decimal number is the numerator, 1 the denominator.

Find an equivalent fraction. That fraction will carry in the denominator a 1, an

Finally, the change in the water level of the pond after 24 hours is 1.2 inches or what is the same inches

User Daniel Scocco
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6.6k points
4 votes

Answer:

The answer is 904 g

Step-by-step explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 7.86 ×115 = 903.9

We have the final answer as

904 g

Hope this helps you

User Liam Martens
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6.2k points