Solve the problem.The half-life of a certain radioactive substance is 23 years. Suppose that at time 
there are 26 g of the substance. Then after t years, the number of grams of the substance remaining will be N(t) = 26(1/2)t/46. How many grams of the substance will remain after 92 years?
A. 1.63 g
B. 6.5 g
C. 0.81 g
D. 3.25 g
Answer: B
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Solve.2x1/2 - 15x1/4 - 50 = 0
A. 10,000, 
B. -10, -5
C. 10,000
D. 10, - 
Use the compound interest formula to determine the final value of the given amount.$1,000 at 6% compounded semiannually for 4 years
A. $1229.87 B. $266.77 C. $1266.77 D. $1262.48
Find the vertex and axis of symmetry of the graph of the function.f(x) = x2 - 4x
A. (4, -2); x = 4 B. (-2, 4); x = -2 C. (-4, 2); x = -4 D. (2, -4); x = 2
Solve the problem.The matrices give points and rebounds for five players in two games. Find the matrix that gives the averages. Points Rebounds src="https://sciemce.com/media/4/ppg__rrrrr0625191014__f1q116g6.jpg" alt="" style="vertical-align: -4.0px;" /> 
Points Rebounds
A. 
B. 
C. 
D. 