Solve the problem.The half-life of plutonium-234 is 9 hours. If 30 milligrams is present now, how much will be present in 3 days? (Round your answer to three decimal places.)
A. 23.811
B. 0.117
C. 2.976
D. 17.23
Answer: B
Mathematics
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Solve.log9 (x - 4) + log9 (x - 4) = 1
A. -
, 
B. -7, 7
C. 7
D. 
Mathematics
Determine the slope and y-intercept of the line represented by the equation. Graph the line using the slope and y-intercept.4x - 5y = -2
A. m = 
, y-intercept is (0, 
)
B. m = - 
, y-intercept is (0, 
)
C. m = - 
, y-intercept is (0, - 
)
D. m = 
, y-intercept is (0, - 
)
Mathematics
Find the specified quantity.Find the period of y = -5 cos 
.
A. 5?
B. 
C. 8?
D. 4?
Mathematics
A formula is given along with the values of all but one of the variables in the formula. Find the value of the variable not given.I = prt; I = 33.6, p = 140, r = 0.06
A. 282.24 B. 2.8224 C. 0.4 D. 4
Mathematics