Answer:
D&E, A&B
Step-by-step explanation:
It's pretty confusing but I know any of the answers with "c" in it is incorrect. The other options seem correct.
Answer:
It will be the bottom right one.
Step-by-step explanation:
This is because she has 7 plus some white ones which would be 7+x. And since she is giving each teacher 5 than that is 5 times 3.
Draw a diagram (shown below) to illustrate the problem.
The rotational speed is
ω = (3 rev/min)*(1 min/60 s)*(2π rad/rev) = π/10 rad/s
The period is
T = 2π/ω = 20 s
The amplitude of the rotational motion is equal to the radius of 15 ft.
At t=0, the height of the tip of the blade is horizontal to the right, therefore its motion relative to the ground is given by
![y=15 sin( \frac{ \pi t}{10})+40](https://tex.z-dn.net/?f=y%3D15%20sin%28%20%5Cfrac%7B%20%5Cpi%20t%7D%7B10%7D%29%2B40%20)
A plot of the motion is shown below.