Suppose that Polonium decays at a rate propotional to the amount present. If a sample of...

Suppose that Polonium decays at a rate propotional to the amount present. If a sample of

Polonium -210 decays so that there is 50 gr left after 140 days and 25 gr after 280 days, how much Polonium

did the sample have to begin with?

A balloon is rising at a constant speed 4 m/sec. A boy is cycling along a straight road at a speed

of 8 m/sec. When he passes under the balloon, it is 36 metres above him. How fast is the distance between

the boy and balloon increasing 3 seconds later?

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milcah answered 1 year ago

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