Show that the function is a solution of the wave equation.w(x, t) = sin (-9x - 9ct)
A. No
B. Yes
Answer: B
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Solve the problem.Suppose that the speed of a car, measured in miles per hour (mph), is monitored for some short period of time after the driver applies the brakes. The following table and graph relate the speed of the car to the amount of time, measured in seconds (sec), elapsed from the moment that the brakes are applied.
What general trend do the data reflect? In which of the time intervals does the speed change the most?
A. With increasing elapsed time, the speed decreases. The speed changes most during the time interval from 8 seconds to 10 seconds. B. With increasing elapsed time, the speed increases. The speed changes most during the time interval from 8 seconds to 10 seconds. C. With increasing elapsed time, the speed increases. The speed changes most during the time interval from 2 seconds to 4 seconds. D. With increasing elapsed time, the speed decreases. The speed changes most during the time interval from 2 seconds to 4 seconds.
Find the part.0.4% of 2000 trees
A. 80 trees B. 800 trees C. 0.8 trees D. 8 trees
Write an algebraic equation and use it to solve the problem.The revenue of Company X triples. Then it increases by $2.4 million to its present revenue of $16.5 What was the original revenue?
A. The original revenue of Company X was $6.3 million. B. The original revenue of Company X was $4.7 million. C. The original revenue of Company X was $14.1 million. D. The original revenue of Company X was $3.1 million.
Identify the figure as a line, a ray, a line segment, or an angle. Then name the figure using the given points.
A. line segment; 
B. ray; 
C. ray; 
D. line; 