Solve.Cally and Sam build and install cabinets in newly constructed homes. When working together, the expression 
represents the portion of the job completed by Cally and 
represents the portion completed by Sam. Write a rational expression that describes their combined work.
A. 
+ 
B. 
C. 
D. 
- 
Answer: A
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Answer the question.You are hiking on a mountainside, following a trail that slopes downward for a short distance and then begins to climb again. At the bottom of this local "dip", what can be said about the relationship between the trail's direction and the contour of the mountainside? [Hint - Think of the trail as a constrained path, g(x, y) = c, on the mountainside's surface, altitude = f(x, y). Consider only infinitesimal displacements.]
A. At the bottom of the dip, the trail is headed along the mountain's contour line which passes through that point. B. At the bottom of the dip, the trail is headed perpendicular to the mountain's contour line which passes through that point. C. At the bottom of the dip, the trail is headed in the direction of the mountain's steepest ascent. D. The mountainside rises in all directions relative to the dip.
Evaluate the integral.
A. 9xex - 9ex + C B. 9ex - ex + C C. 9ex - 9xex + C D. xex - 9ex + C
Convert the measurement to degrees Fahrenheit. Round your answer to the nearest tenth of a degree if necessary.80°C
A. 150.4°F B. 176°F C. 76.0°F D. 201.6°F
Find an equation of a parabola satisfying the given conditions.Focus at (
, 0), directrix x = - 
A. y2 = 4
x
B. y2 = 4
y
C. x2 = 4
x
D. y2 = 24x