Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Calculate the arc length of the indicated portion of the curve r(t).r(t) = (3 + 2t2)i + (2t2 - 2)j + (5 - t2)k, 1 ? t ? 2
A. 27 B. 9 C. 45 D. 15
Mathematics
Solve. Write the answer in simplest form.Rennie is saving 
of her monthly income of $6594 for retirement. How much money is she setting aside each month for retirement?
A. $1413 B. $157 C. $30,772 D. $471
Mathematics
Write an equivalent fraction with the given denominator. 
= 
A. 
B. 171
C. 1710
D. 9
Mathematics
Prove the identity.
?
What will be an ideal response?
Mathematics