Solve the problem.Suppose that a hair dryer operates on a voltage that can be represented by the relation 
and that it draws a current represented by the relation 
where t is time measured in seconds. The power consumed by the appliance is P = VI. Graph the power in 
by 
and use an identity to write the expression for the power in the
form 
where a, k, and d are constants.
A. P = 640 cos(240?t) + 640
[0, 0.04, 0.01] by [-200, 2000, 200]
B. P = 1280 cos(240?t) + 1280
[0, 0.04, 0.01] by [-200, 2000, 200]
C. P = 640 cos(120?t) + 640
[0, 0.04, 0.01] by [-200, 2000, 200]
D. P = -640 cos(240?t) + 640
[0, 0.04, 0.01] by [-200, 2000, 200]
Answer: A
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Solve.Annica owes $734.48 on her charge card. She returns for credit items costing $23.44 and $36.43. She makes a purchase for $26.51 and additional purchases of $40.26, $197.02, and $127.82. She then makes a payment of $747.45. Find the amount she now owes.
A. $1030.45 B. $438.51 C. $318.77 D. $1150.19
Use an Euler diagram to determine whether the argument is valid or invalid.All businessmen wear suits.Aaron wears a suit. ? Aaron is a businessman.
A. Invalid B. Valid
Perform the indicated operations.(3x2 - 8x + 4) - (x2 - 3x + 2) + (8x2 + 5)
A. -6x2 - 11x + 11 B. 10x2 - 5x + 11 C. 10x2 - 5x + 7 D. 10x2 - 11x + 7
Perform the indicated operation. Give the answer in lowest terms.
A. 
B. 
C. 
D. 