Write the scientific notation in standard form.A group of astronomers detected a radio signal that originated approximately 
light years from Earth.
A. 124.2
B. 20,700,000
C. 2,070,000
D. 207,000
Answer: C
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Find the domain of the expression.
A. {x|x ? -2 and x ? -4} B. {x|x ? -8 and x ? +8} C. {x|x ? 2 and x ? 4} D. {x|x ? 0}
Find zw or 
as specified. Leave your answer in polar form.z = 1 - iw = 1 - 
iFind 
.
A. 
(cos 15° + i sin 15°)
B. 
(cos 75° + i sin 75°)
C. 
(cos 15° + i sin 15°)
D. 
(cos 75° + i sin 75°)
Express as a product.log8y4
A. 8log4y4 B. 8log4y C. 4log8y D. 4log8y4
Write an algebraic expression for the specified quantity.An auto repair shop charged a customer $307.25 to repair a car. The bill listed $67.75 for parts and the remainder for labor. Let x = the number of hours of labor it took to repair the automobile. Write an algebraic expression in x for the labor charge per hour.
A. 
B. 
C. 
D. 