Solve the problem.For 2009, the government of Country X collected $2.4 trillion in revenues, but spent $8.6 trillion. Write the government's budget deficit as a signed number.
A. -$11 trillion
B. $6.2 trillion
C. $11 trillion
D. -$6.2 trillion
Answer: D
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Prove that the equation is an identity.
= cot(15k) tan (2k)
What will be an ideal response?
Solve.6x - 9x + 11x = 32 - 12x + 4x
A. x = 2 B. x = -3 C. x = 3 D. x = -2
Determine the amplitude and range of the function and sketch its graph.y = -2 cos 3x
A. amplitude: 2; range: [0, 2]
B. amplitude: 2; range: [-2, 2]
C. amplitude: 2; range: [-2, 2]
D. amplitude: -2; range: [0, 2]
Use the Richter scale equation 
, where M is the magnitude of an earthquake, I is the intensity of the shock waves, and 
is the measure of the intensity of a zero-level earthquake. An earthquake occurred that measured 8 on the Richter scale. Find the intensity of the earthquake in terms of . Round to the nearest whole number.
