Suppose the daily cost C of manufacturing x bicycles is given by C(x) = 50x + 5000. Now the average daily cost is given by C(x) = 50x + 5000/x. How many bicycles must be produced each day in order for the average cost to be no more than $150? Choose the correct answer below. 50 or more bicycles must be produced. 50 or fewer bicycles must be produced. Either 50 or more bicycles or 0 or fewer bicycles must be produced. Between 0 and 50 bicycles must be produced.

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general 10 months ago 6146

A question of medical importance is whether jogging leads to a reduction in one’s pulse rate. To test this hypothesis, 8 nonjogging volunteers agreed to begin a 1-month jogging program. After the month their pulse rates were determined and compared with their earlier values. If the data are as follows, can we conclude that jogging has had an effect on the pulse rates? Subject 1 2 3 4 5 6 7 8 Pulse Rate Before 74 86 84 79 70 78 79 70 Pulse Rate After 70 85 90 110 71 80 69 74Can you conclude that jogging leads to a reduction in one's pulse rate?

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general 10 months ago 8706

Suppose you have a light bulb that emits 50 watts of visible light. (Note: This is not the case for a standard 50-watt light bulb, in which most of the 50 watts goes to heat and only about 5-7 watts is emitted as visible light.) How far away would you have to put the light bulb for it to have the same apparent brightness as Alpha Centauri A in our sky? (Hint: Use 50 watts as L in the inverse square law for light, and use the apparent brightness given above for Alpha Centauri A. Then solve for the distance.)

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general 10 months ago 9042