Answer:
In the given figure:
The reflex angle and
[By vertical angle theorem]
From the given we can say that:
and
are supplementary angles.
Supplementary angles states that the two measure are add up to 180 degree.
⇒ .....[1]
then; the reflex angle DOB is:
Substitute the given values we get;
Subtract y from both sides we get;
Divide both sides by 2.5 we get;
We have to find the non reflex
Non reflex angle DOB is;
Therefore, the non-reflex angle DOB is 108 degree.
Answer: The total volume of air contained in the bubbles of one sheet of bubble wrap is about 0.5 cubic meters.
Step-by-step explanation:
Volume of sphere :-
, where r is the radius of the sphere.
Given : Diameter of the bubble = 0.01 m
Then Radius of the bubble =
Volume of each bubble:-
Also, Number of bubbles in each sheet = 1,000,000
Then , the total volume of air contained in the bubbles of one sheet of bubble wrap will be :-
Hence, the total volume of air contained in the bubbles of one sheet of bubble wrap is about 0.5 cubic meters.