Solve the problem.A particular substance decays in such a way that it loses half its weight each day. How much of the substance is left after 9 days if it starts out at 128 grams?
A. 
g
B. 
g
C. 2 g
D. 4 g
Answer: A
Mathematics
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Use logax = (ln x)/(ln a) to calculate the logarithm. Round to the nearest ten thousandth.log4.2 177
A. 42.1429 B. 2.2480 C. 0.2772 D. 3.6069
Mathematics
Solve the inequality and graph the solution set.| x - 1 | ? 6
A. [-5, ?)
B. [7, ?)
C. [-5, 7]
D. (-?, -5] ? [7, ?)
Mathematics
Determine whether the lines through each pair of points are perpendicular.(7, 5) and (-11, 23); (-9, -1) and (0, -10)
A. perpendicular B. not perpendicular
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Solve the matrix equation for X.Let A = 
and B = 
;
5B - 5A = X
A.
X = 
B.
X = 
C.
X = 
D.
X = 
Mathematics