The following are the ages (years) of 5 people in a room: 18, 21, 12, 12, 23 A person enters the room. The mean age of the 6 people is now 22. What is the age of the person who entered the room?

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation:

51840000 cm 2

step-by-step explanation:

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true