Write equation which gives amount of iodine remaining
Half-life of iodine-123 is about 13 hours. You start with 1424 grams of iodine-123.
(a) Write the equation which gives amount of iodine-123 remaining after t hours.
(b) Find out number of hours required for the sample to decay to 8 grams.
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The colony of bacteria grows exponentially. Colony starts with 3 bacteria, but 2 hours after beginning of experiment, it has grown to 780 bacteria. Write the formula for number of bacteria as the function of time.
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Half-life of iodine-123 is about 13 hours. You start with 1424 grams of iodine-123. Write the equation which gives amount of iodine-123 remaining after t hours.
For five points, express the multinomial coefficient 10M{2,3,5} as a product of binomial coefficients. Hint: the first one is10C2. For five more points, give a general formula for calculating the multinomial coefficient nM{a,b,c,d}, where a+b+c+d=n.
The far point of a near-sighted person is 6.5 m from her eyes, and she wears contacts which facilitate her to see far-away objects clearly. A tree is 23.8 m away and 2.8 m high.
School wishes to build the wheel-chair ramp, with the incline of 15 degrees, from ground to door. How much horizontal distance is required for ramp?
Your friend consists of a near point of 121 cm, and she wears contact lenses that encompass a focal length of 37.0 cm. Explain how close can she hold a magazine and still read it clearly?
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