Simplify the expression and write the answer without negative exponents.(-4x2)(7x8)

A. -28x16
B. 28x10
C. 28x16
D. -28x10


Answer: D

Mathematics

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Solve the given differential equation.y''' + 3y'' + 25y' + 75y = 0

A. y = C1e-4x + (C2 + C3x)e-7x B. y = C1e-4x + C2e7x + C3e-7x C. y = C1e-4x + (C2 cos 7x + C3 sin 7x) D. y =(C1 + C2x)e-4x + C3e7x

Mathematics

Evaluate the improper integral or state that it is divergent.

A. -19 B. 38 C. Divergent D. 19

Mathematics

Find the length of the arc intercepted by a central angle ? in a circle of radius r. Round your answer to three decimal places when necessary.? = 40°, r = 12 in.

A. 9.216 in. B. 8.378 in. C. 7.54 in. D. 6.702 in.

Mathematics

Find the LCD of the list of fractions.

A. 9 B. 7 C. 63 D. 16

Mathematics