Write as a proportion.Victor knows he can type 2100 words in 30 minutes, so he feels confident that he can type 4200 words in 60 minutes.

A. =
B. =
C. =
D. =

Answer: D

Mathematics

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Simplify.(-8)2 + (-6)2 + 8

A. -108 B. 204 C. -204 D. 108

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Solve the given differential equation. (The form of yp is given.)D2y - 4y = e-2x (Let yp = Axe-2x.)

A. y = c₁e^-2x + c₂e^2x + xe^-2x
B. y = c₁e^-2x + c₂e^2x - xe^2x
C. y = c₁e^-2x + c₂e^2x - xe^-2x
D. y = c₁e^-2x + c₂e^2x - xe^-2x

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Graph the two functions on one coordinate plane.f(x) = g(x) = - 6

A.

B.

C.

D.

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Solve the problem.If $4000 is invested in an account that pays interest compounded continuously, how long will it take to grow to $4800 at 9%? Round to the nearest tenth.

A. 7.7 years B. 2.0 years C. 7.4 years D. 9.2 years

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Mathematics