Solve the problem.The voltage E in an electrical circuit is given by E = 4.2 cos 160?t, where t is time measured in seconds. Find the amplitude.
A. 160
B. 4.2
C. 160?
D. 8.4
Answer: B
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Write the negation of the following statement.~p: It is not true that today is May 9.
A. p: Yesterday was not May 7. B. p: Today is May 9. C. p: It is not true that today is May 10. D. p: Today is not May 10.
Solve the problem.Ron throws a ball straight up with an initial velocity of 40 feet per second from a height of 7 feet. Find parametric equations that describe the motion of the ball as a function of time. How long is the ball in the air? When is the ball at its maximum height? What is the maximum height of the ball?
A. x = 0; y = -16t2 + 40t + 7; 5.328 sec; 1.25 sec; 25 feet B. x = 0; y = -16t2 + 40t + 7; 4.621 sec; 1.25 sec; 177.892 feet C. x = 0; y = -16t2 + 40t + 7; 2.311 sec; 1.25 sec; 6.988 feet D. x = 0; y = -16t2 + 40t + 7; 2.664 sec; 1.25 sec; 32 feet
Determine whether or not the function is one-to-one.
A. No B. Yes
Solve the problem.Let the demand and supply functions be represented by D(p) and S(p), where p is the price in dollars. Find the equilibrium price and equilibrium quantity for the given functions.D(p) = 265,860 - 260pS(p) = 1000p
A. $265; 196,960 B. $211; 211,000 C. $740; 73,460 D. $740; 211,000