Solve the problem.A cruise boat travels 12 miles downstream in 4 hours and returns to its starting point upstream in 6 hours. Find the speed of the stream.
A. 3 mph
B. 5.5 mph
C. 0.5 mph
D. 2.5 mph
Answer: C
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Provide an appropriate response.Are the two expressions equivalent? Explain your answer.
- 
and 
What will be an ideal response?
Graph f as a solid line and f-1 as a dashed line in the same rectangular coordinate space. Use interval notation to give the domain and range of f and f-1.f(x) = x2 - 7, x ? 0
A. 
f domain = (-?, ?); range = (-7, ?)
f-1 domain = (-?, ?); range = (7, ?)
B. 
f domain = (0, ?); range = (-7, ?)
f-1 domain = (0, ?); range = (7, ?)
C. 
f domain = (0, ?); range = (-7, ?)
f-1 domain = (0, ?); range = (-7, ?)
D. 
f domain = (-?, ?); range = (-7, ?)
f-1 domain = (-?, ?); range = (-7, ?)
Find the slope and the y-intercept of the given line.y = 3x - 5
A. -5, (0, 3) B. 5, (0, 3) C. 3, (0, -5) D. 3, (0, 5)
For the demand function given, find the elasticity at the given price and state whether the demand is elastic, inelastic, or whether it has unit elasticity.q = D(x) = 
; x = 60
A. 
; inelastic
B. 1; unit elasticity
C. 
; elastic
D. 
; inelastic