Estimate the sum as indicated. Then answer the question.Estimate the following sum by first rounding to the nearest hundred. Does the estimate give you reason to doubt the stated sum?
A. Estimate: 12,600 ; yes
B. Estimate: 12,900 ; no
C. Estimate: 12,600 ; no
D. Estimate: 12,900 ; yes
Answer: A
Mathematics
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Find an equation of a parabola satisfying the given conditions.Find the equation of the parabola with vertex at the origin and axis along the x-axis if the parabola passes through the point 
A. x2 = -6y
B. y2 = -6x
C. y2 = - 
x
D. x2 = - 
y
Mathematics
Simplify the expressions. Make all exponents positive.(54)9
A. 536 B. 2536 C. 254 D. 513
Mathematics
Factor the sum or difference of two cubes completely.729x3 + 1
A. (9x + 1)(81x2 - 9x + 1) B. (9x + 1)(81x2 + 1) C. (9x + 1)(81x2 - 9x - 1) D. (9x + 1)(81x2 + 9x + 1)
Mathematics
Approximate the value using a calculator. Round your answer to three decimal places.e-1.1
A. 0.633 B. 0.333 C. -2.990 D. -0.333
Mathematics