Step-by-step explanation:
Forced vital capacity: the maximum amount of air you can forcibly exhale from your lungs after fully inhaling. It is about 80 percent of total capacity, or 4.8 liters, because some air remains in your lungs after you exhale
Answer:
answer = -13
Step-by-step explanation:
number = x
x - 8 = -21
x = -21 + 8
= -13
Recheck :
num = - 13
decreased by 8 = - 13 -8 = -21
1 Whole is bigger than a fraction
1 part of the 6 equal groups is shaded
1/3
Ok so we know that the distance around the circle (or circumference) is equal to the diameter times pi.
This means that

d being the diameter,
This means that:

= 12.00028271
= 12 m
So the diameter of the circle is 12 metres.
Hope this helped