Provide an appropriate response.You are solving an application problem, and the equation you are required to solve has this radical: 
. After you complete the solution, you obtain the answers 2 and 13. Which answer must you reject and why?
What will be an ideal response?
The solution 2 must be rejected, because it will cause the number under the radical to be negative. The square root of a negative number can not be found in the real number system.
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Find the standard form of the equation of the parabola directrix: x = -5 and vertex at the origin.
a. y2 = 20x b. y2 = –5x c. x2 = –20y d. x2 = 20y
Determine whether the expression represents a number that is positive, negative, or zero.(-3)-3
A. Positive B. Zero C. Negative
Write the complex number in trigonometric form, using degree measure for the argument.-4
+ 4i
A. 8(cos(-135°) + i sin(-135°)) B. 8(cos 135° + i sin 135°) C. 8(cos(-45°) + i sin(-45°)) D. 8(cos 45° + i sin 45°)
Multiply to find the exact answer. Express the answer as a whole or mixed number when possible and simplify.2
? 8
A. 16
B. 128
C. 10
D. 23