-497
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45 minutes(0.75(75 tenths)is 75% of an hour or 3quarters 60 minutes divided by 4 multiplied by 3 = 45)
500 + 500 = 1000
500*500=25,000
That is equal to 500(1 + 500) / 2.That is equal to 500(1 + 500) / 2.That is equal to 500(1 + 500) / 2.That is equal to 500(1 + 500) / 2.
The answer is 500