Find the product.(0.5 + 9a)(0.4 + 7a)
A. 0.2 + 7.1a + 63a2
B. 0.2 - 7.1a + 63a2
C. 0.2 + 7.1a + 0.63a2
D. 2 + 7.1a + 63a2
Answer: A
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Solve the problem.The parabola x2 = -28y is shifted 3 units up and 6 units to the right. Find the focus and directrix of the new parabola.
A. Focus: (-4, 6); Directrix: x = 10 B. Focus: (6, -4); Directrix: y = -10 C. Focus: (6, 10); Directrix: y = 10 D. Focus: (6, -4); Directrix: y = 10
Add the given pair of complex numbers geometrically.z1 = -4 - 9i, z2 = 9 + 7i
A. 0 + 2i B. 0 - 2 C. 5 + 2i D. 5 - 2i
Determine whether the expression is a polynomial. If it is a polynomial, give its degree.7x5 - 
A. not a polynomial B. polynomial; degree 1 C. polynomial; degree 5 D. polynomial; degree -1
Write a word name for the number in the sentence.The programmers were working with a graphics file of 406,581,060 bytes.
A. Four hundred sixty million, five hundred eighty-one thousand, six hundred B. Four hundred six thousand, five hundred eighty-one hundred, sixty C. Four hundred six billion, five hundred eighty-one million, sixty D. Four hundred six million, five hundred eighty-one thousand, sixty