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Carbon-14 has a half-life of approximately 5730 years

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Carbon-14 has a half-life of approximately 5730 years. Find
how long it will take to decay an initial amount of 100 grams of Carbon-14 to 1 gram?
– A can of soda is taken from a room at 78° F and placed in a refrigerator whose internal temperature is 34° F. After 30 minutes the temperature of the soda is 48° F . Use Newton’s Law of Cooling to find how long it will take the soda to reach 38° F.
-A circular sector with central angle of 72° is cut out of a circle of diameter 700 mm. What is the area of this sector?
-The cos(θ) = 3/7 and θ is in the 4th quadrant. Find the exact value of sin(θ)

 
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