Solve the problem. Express your answer in scientific notation, and round to one decimal place. The sun radiates energy into space at the rate of 3.9 × 1026 joules per second. How many joules are emitted in two weeks?
A. 4.7 × 1032 joules
B. 4.7 × 1026 joules
C. 4.7 × 1044 joules
D. 4.7 × 1050 joules
Answer: A
Mathematics
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x = 7, y = 4
A. 
B. 
C. 
D. 
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Use factoring by grouping to solve the equation.2x3 + 8x2 - 8x - 32 = 0
A. -2, 2, 4 B. -8, -4, 4 C. -4, -2, 2 D. -4, -2, 1
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Solve the system by the substitution method.y2 - x2 = 6x - 7 = y
A. 
B. 
C. 
D. 
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Evaluate the expression without using a calculator. (Assume the variable represents a positive number.)
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What will be an ideal response?
Mathematics