How many ball bearings, each with a diameter of 1 cm, can be made using 5.24 cm3 of molten steel? A) 4. B) 7. C) 8. D) 10
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The answer is C:
Starting with the given formula for the area, A = 1/2hb, the first step is to isolate h by using the multiplicative inverse of b, which is on both sides of the equation:
The result will be:
The last step is to use the multiplicative inverse of , which is 2 or
to further isolate the variable <em>h </em>:
The formula for h will be:
which is the option C in your question.
