Mathematics, 17.01.2020 23:31 charlesgtro7066
Two twin sisters, gwen and jackie, are both 20 years old in the year 2050. jackie takes off on a round-trip to vega, 25 light-years away. she travels at an average speed close to the speed of light, say, 0.c. according to gwen back on earth, about how long does it take jackie to reach vega? a. about a month
b. about 10 years
c. about 25 years
d. about 100 years
Answers: 2
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On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?
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The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60
Answers: 1
Two twin sisters, gwen and jackie, are both 20 years old in the year 2050. jackie takes off on a rou...
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