6 nickels is 30 cents and 30 cents is 3/10 of a dollar which is 30% of a dollar.
Answer = a) add them
When you multiply terms you add the exponents
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Eighty four million, three hundred and three thousand, nine hundred and twelve
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Answer: d. The helicopter rotor will spin 36,000 times in 1 hour
Step-by-step explanation:
Option A is wrong because in 40 minutes the rotor will spin:
= 40 * 600
= 24,000 times
Option B is wrong because we cannot know the number of times the rotor will spin before being lifted off of the ground with the details given.
Option C is wrong because in 3 hours the rotor will spin:
= 600 * 3 * 60 minutes
= 108,000 times
Option D is correct because in 1 hour the rotor will spin:
= 600 * 1 * 60 mins
= 36,000 times
Idk but I think the answer you are looking for is D
