Solve the problem.The current I, in amperes, flowing through a particular ac (alternating current) circuit at time t seconds is I = 220 sin (45?t)What is the period and amplitude of the current?
A. period = 
second, amplitude = 45
B. period = 45? seconds, amplitude = 
C. period = 
second, amplitude = 220
D. period = 
second, amplitude = 135
Answer: C
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Reduce the fraction to simplest form.
A. 
B. 
C. 
D. 
Solve the problem.A school building has a height of 50 feet. Its shadow is currently 11.4 feet long, and the shadow of the church next door is 20.5 feet long. Use similar triangles to calculate the height of the church to the nearest tenth of a foot.
A. 11,685.0 feet B. 27.8 feet C. 89.9 feet D. 46.7 feet
Multiply.(n + 8)2
A. n + 64 B. 64n2 + 16n + 64 C. n2 + 16n + 64 D. n2 + 64
Provide an appropriate response.Determine if the following statement is true or false. Explain your answer.For every real number x, x < 0 ? x2 < 0.
What will be an ideal response?