100 cm = 1 meter
80 cm = 0.8 meter
200 meters/.8 meters = number of boards
250
Circumference is found with the formula
c = pi × d
d is diameter and we will use 3.14 for pi.
The diameter is the measure across the center of the circle. In the first problem, you are given the radius, so we have to multiply by 2 to get the diameter. Then we can use the formula.
12.4 in × 2 = 24.8 in (that's the diameter)
c = pi × D
c = 3.14 × 24.8
c = 77.872 inches
circumference is 77.872 inches.
Try the other problems on your own. They are just like this one. Just make sure they are giving you the diameter and not the radius. Post if you have problems.
Answer:
3x-4x7
Step-by-step explanation:
Answer:
B. Of the people surveyed that were alive at the time, 90% of them knew exactly where they were when they heard the news.
Step-by-step explanation:
