Answer:
She is not correct.
Step-by-step explanation:
If she originally purchases the teas for $100 and then she marks the price up 20%, the retail price would then be 100 + 0.20(100) = 100 + 20 = 120. The sales price would then be 120 - 0.2(120) = 120 - 24 = 96. This is less than the purchase price, so she is losing money, rather than gaining.
I hope this helps. If you download an app called Slader, it has the same math book you are using with the answers.
Answer:
None of the above
Step-by-step explanation:
20 x 4 = 80
20 + 20 +20 =20 = 80
Answer: Option B
Step-by-step explanation:
The general cosine function has the following form
Where A is the amplitude: half the vertical distance between the highest peak and the lowest peak of the wave.
is the period: time it takes the wave to complete a cycle.
k is the vertical displacement.
The maximum value of y is is 0.75 and the minimum is -0.75. Then the amplitude A is:
Then
The cycle is repeated every units
So the period is
Thus:
The function is:
when y is maximum therefore As shown in the graph
Answer:
A.
Step-by-step explanation: