Let Q represent a mass of radioactive radium (226Ra) (in grams), whose half-life is 1599 years. The quantity of radium present after t years is
Determine the quantity present after 300 years. Round to the nearest hundredth of a gram.
A. 0 g
B. 0.47 g
C. 5.00 g
D. 4.39 g
E. 0.88 g
Answer: D
You might also like to view...
Solve the problem.The spring of a spring balance is 6.0 in. long when there is no weight on the balance, and it is 9.3 in. long with 8.0 lb hung from the balance. How much work is done in stretching it from 6.0 in. to a length of 10.7 in.?
A. 95 lb?in. B. 5.7 lb?in. C. 4.6 lb?in. D. 27 lb?in.
One mole of gas expands isothermally to double its volume. If the gas temperature is 360K, what energy is absorbed? ?
A. 396 joules B. 147 joules C. 2,287 joules D. 2,075 joules E. 3,327 joules
Use calculus and a graphing calculator to find the approximate location of all relative extrema.f(x) = 0.1x5 + 5x4 - 8x3 - 15x2 - 6x - 71
A. Approximate local maxima at -41.132 and -0.273; approximate local minima at -0.547 and 1.952 B. Approximate local maxima at -41.113 and -0.263; approximate local minima at -0.474 and 1.962 C. Approximate local maxima at -41.214 and -0.308; approximate local minima at -0.533 and 1.938 D. Approximate local maxima at -41.118 and -0.281; approximate local minima at -0.593 and 1.938
Find an equation of variation in which the following are true.y varies jointly as x and z, and y = 90 when x = 9 and z = 5
A. y = 10x
B. y = 
C. y = 2xz
D. y = 4xz