1st you combine like terms so subtract 7y and 3y and you get 4y. So this is the final answer: 4y+4b.
Circumference= 2πr
Circumference= perimeter
14.28km= 2(3.14)r
14.28= 6.2831853072r
divide both sides by 6.2831853072
2.27= r
ANSWER: The radius is 2.27km
Hope this helps! :)
1. the last one
2.the first one hope this helps.
Put this into a scientific calculator
1/3 x pi x 18 squared x 16
On the second floor we have 6 apartments, and we have 2 more apartments with 3 bedrooms, so 8/16 apartments are either on the second floor or have 3 bedrooms. 8/16 is the same as 1/2, or 50%
