ANSWER
EXPLANATION
The circumference of a circle is calculated using the formula:
From the question, the radius of the circle is 10 inches.
We substitute the radius into the formula to get:
Let us multiply out to get:
The question required that we leave the answer in terms of π.
The correct choice is C.
Answer:
- The angles do not share a special relationship.
Step-by-step explanation:
Angles 13 — 20 are right angles. Angle 12 is complementary to given angle 7, so is 90°-72° = 18°. Angle 10 is vertical with angle 12, so is also 18°.
There is no special relationship between right angle 14 and acute angle 10.
Okay first you need to combine like terms together (3x and 1x)
7x + 4 = 5 + 4x
now you need x only on one side, you could subtract either 7x or 4x
3x + 4 = 5
subtract 4 over
3x = 1 is the answer
Answer:
Given:
To calculate how many electrons have the same mass as one dust particle, divide the mass of a dust particle by the mass of an electron:
Therefore, approximately 
electrons have the same mass as one dust particle.
