Answer:
Step-by-step explanation:
Plan A: 10 CDs costs $2.30, so 1 CD cost $0.23
Plan B: A package of 50 CDs cost $10.5, so 1 CD cost $1.05
0.23 < 1.05
Choose Plan A
Answer:
The amplitude is 
Step-by-step explanation:
Let f(x) be a sinusoid function that has the following format:

Then b is the amplitude of the function
h is the vertical displacement of the wave
s is the phase angle
is the period.
In this problem 
Then 
Therefore the amplitude of the function is 
The amplitude is a measure of the vertical size of the sinx wave
The outcome will be 3. 4/9.
And yes, I know I'm a day late.
Seven hundred twelve thousandths turns into 0.712.