Solve.A plane traveling 410 mph in still air encounters a 60-mph headwind. How long will it take the plane to travel 770 mi into the wind? Round your answer to the nearest tenth of an hour, if necessary.
A. 0.5 hr
B. 1.6 hr
C. 2.2 hr
D. 269,500 hr
Answer: C
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Solve the initial value problem.?
+ y = cos ?; ? > 0, y(?) = 1
A. y = 
, ? > 0
B. y = 
, ? > 0
C. y = 
, ? > 0
D. y = 
, ? > 0
Find the mode or modes for the set of numbers.82, 50, 32, 50, 29, 82
A. 54.17 B. 50 C. 82, 50 D. 82
The graph and equation of a polynomial f(x) are given. Determine the number of real zeros and the number of imaginary zeros.f(x) = -x3 + 5x2 - 3x - 9
A. One real zero; two imaginary zeros B. Three real zeros; no imaginary zeros C. Two real zeros; no imaginary zeros D. Two real zeros; one imaginary zero
Provide an appropriate response.Decide whether the elimination method or the substitution method involves the least amount of work. Do not solve.x + 2y = 0x - 2y = 24
A. Elimination B. Substitution