Answer:

Step-by-step explanation:
I suggest looking lessons on it online if you don't understand... It's hard to do your work especially if you don't understand it. Or if your online, go to past lessons or something.
Answer:
2 units
Step-by-step explanation:
The radius of the circle is 2 units because you can find the radius by multiplying the diameter by 2. The radius is half of the diameter.
4 divided by 2 is 2.
Hope this helped :)
No; we have
. Substituting these into the DE gives

which reduces to
, true only for
.
Answer:
B.
Step-by-step explanation:
Answer:
28.1 kilometers/hour
Step-by-step explanation:
618.7 kilometers / 22 hours = 28.1 kilometers/hour