Answer:
Step-by-step explanation:
C = 2 * pi * r
C = 147
147 = 2 * pi * r
147 = 2*3.14 * r
147 = 6.28 * r
r = 147 / 6.28
r = 23.41
Area = pi r^2
Area = 3.14 * 23.41^2
Area = 3.14 * 547.92
Area = 1720.46
Answer:
Step-by-step explanation:
<u>Angle formed by two tangents is equal to half of the difference of intercepted arcs:</u>
- m∠C = 1/2(arcAXB - arcAB)
- 64° = 1/2(mAXB - mAB)
- mAXB - mAB = 128°
<u>The sum of the same two arcs is a full circle:</u>
<u>Add the two equations together:</u>
- 2mAXB = 360° + 128°
- 2mAXB = 488°
- mAXB = 244°
Correct choice is C
Theorem: If a random variable is normally distributed with a mean of µ and a standard deviation of σ, then the sample mean with a sample size of n would be normally distributed too with the same mean and a standard deviation of
.
In this case, µ = 1200, σ = 60, sample size n = 36.
So the sample mean has a mean of 1200 and a standard deviation of
.
Then the z-score that corresponds to 1224 is
Ryan walked faster. He ended up walking 2 1/10 km faster than Olivia.