Solve the problem.Sue can sew a precut dress in 3 hours. Helen can sew the same dress in 2 hours. If they work together, how long will it take them to complete sewing that dress? Give your answer rounded to one decimal place, if necessary.
A. 1.8 hr
B. 5 hr
C. 2.5 hr
D. 1.2 hr
Answer: D
Mathematics
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Use the given transformation to evaluate the integral. src="https://sciemce.com/media/4/ppg__tttt0610191318__f1q178g7.jpg" alt="" style="vertical-align: -4.0px;" />
A. -10
B. 10
C. -5
D. 5
where R is the parallelogram bounded by the lines 
Mathematics
Name the conic.
A. parabola B. circle C. ellipse D. hyperbola
Mathematics
Find a vector parallel to v of the given length.v = 
with P(-1, 1, 0) and Q(-1, 2, 1); length 5.
A. 
B. 
C. 
D. 
Mathematics
Which of the following graphs could represent a function with the following properties?I.f(x) > 0, for x < 0II.f '(x) ? 0, for all xIII.f '(0) = 0
A. 
B. 
C. 
D. none of these
Mathematics