Solve the problem.Martha can rake the leaves in her yard in 7 hours. Her brother can do the job in 3 hours. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 5
hr
D. 2
hr
Answer: D
Mathematics
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Find the volume by double integration.The volume bounded by the surface 
and the xy-plane
A. 
?
B. 4?
C. 8?
D. 
?
Mathematics
Provide an appropriate response.If z = exy and x = 
; y = ln (r + s) find:(a) 
(b) 
What will be an ideal response?
Mathematics
Perform the indicated operation. Simplify, if possible.
+ 
- 
A. 
B. 
C. 
D. 
Mathematics
Find the 3 × 3 matrix that produces the described composite 2D transformation, using homogeneous coordinates.Rotate points through 45° and then scale the x-coordinate by 0.6 and the y-coordinate by 0.8.
A. 
B. 
C. 
D. 
Mathematics