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Assume that each decays according to the formula A(t)=A0ekt where A0 is the initial amount of the material and k is the decay constant.
Cobalt-60, used in food irradiation has a half-life of 4.6 years. If there is initially 148 grams present, find the following.
(a) The decay constant, k. Round your answer to four decimal places.
k= 34.31 Incorrect. Tries 1/99 Previous Tries
(b) Find a function A(t) for the amount of the isotope, A in grams which remains after time t in years.
A(t)= 6.90 Incorrect. Tries 1/99 Previous Tries
(c) Determine the time t in years for 90% of the material to decay. Round yours answer to two decimal places.
t= 40 years
In 1736, a famous Swiss mathematician Leonhard Euler (1707 - 1783) started the work in the area of Graph Theory through his successful attempt in solving the problem of "Seven Bridges of Konigsberg."
Find a minimum spanning tree of the graph that connects the capital cities of the 50 states in the United States to each other where the weight of each edge is the distance between the cities.
The graphs in Figure represent the velocity, v, of a particle moving along the x-axis for time 0 = t = 5. The vertical scales of all graphs are the same.
estimate the number of farms whose land and building values
When 300 junior college students were surveyed, 145 said they have a passport. construct a 95% confidence interval for the proportion of junior college students that have a passport.
1. Explain how reducing disposition cycle time can help you from losing further value of returned goods.
A trapezium with an area of 168cm squared has parallel sides of lengths 6cm and 18cm.
find the distance between A and B
To buy a laptop, Susan receives a $2000 loan at a 6.5% annual interest rate on January 10. The loan is due May 15. The year is not a leap year. Round the answers to the nearest cent (nearest hundredths)
Define an appropriate matrix, and restate the problem using the phrase "columns of A."
Define an intercept in a parabolic graph. What are the number(s) of intercepts a quadratic graph may have? Explain your answer/ diagram etc. How do you compute the intercepts in a quadratic function?
Figure shows the distribution of elevation, in miles, across the earth's surface. Positive elevation denotes land above sea level; negative elevation shows.
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