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 7 days if it starts out at 16 grams?

A. 8 g
B. 4 g
C. g
D. g

Answer: D

Mathematics

Factor by factoring out the negative of the GCF.-15s6t3 - 5s4t4

A. -5s2t(3s + t) B. -s4t3(15s + 5t) C. -5s6t4(3s2 + t) D. -5s4t3(3s2 + t)

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Mathematics

Find the intersection of the given intervals.(-?, 10) ? [-3, 16)

A. [-3, 10) B. (10, 16) C. (-?, 16) D. (-?, -3]

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Mathematics

For the given function f(x), find f-1(x). State the domain of f-1(x).f(x) = - 8

A. f-1(x) = (x - 8)2, x ? - 8 B. f-1(x) = (x + 8)2, x ? - 8 C. f-1(x) = -(x + 8)2, x ? - 8 D. f-1(x) = x + 8, x ? - 8

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Mathematics

Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution. 5x + 4y - z = 48 x - 4y - 8z = -69-4x + y + z = -16

A. {(8, 3, 7)} B. {(7, -5, -7)} C. {(7, 5, 7)} D. {(5, 7, 5)}

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Mathematics