Solve the problem.A projectile is fired with an initial velocity of 400 feet per second at an angle of 70° with the horizontal. In how many seconds will the projectile reach its maximum altitude? (Round your answer to the nearest tenth of a second.)
A. 16.6 sec
B. 11.8 sec
C. 8.4 sec
D. 19.9 sec
Answer: B
Mathematics
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Solve.6r + 10 = 52
A. 40 B. 36 C. 7 D. 1
Mathematics
Write the given iterated integral as an iterated integral with the order of integration interchanged.
A. 
B. 
C. 
D. 
Mathematics
Decide whether the given statement is always true or not always true.(A ? B)' = A'? B'
A. Always true B. Not always true
Mathematics
Sketch the graph and show all local extrema and inflection points.y = |x2 - 5x|
A. Local minima: (0, 0), (5, 0)
Local maximum: 
No inflection points
B. Local maximum: 
Inflection points: (0, 0), (5, 0)
C. Local minima: (0, 0), (5, 0)
Local maximum: 
Inflection points: (0, 0), (5, 0)
D. Local minimum: 
No inflection points
Mathematics