Answer:
10.21 feet.
Step-by-step explanation:
circumference of circle with diameter d is given by 
where r is the radius of the circle.
_____________________________
given
diameter = 6 1/2 = 13/2 feet
\thus, circumference of circle is calculated as following

Thus, circumference of given circle is 10.21 feet.
Answer: 300
Step-by-step explanation:
20% of 240 is 48. The local business gives 48 dollars. 5% of 240 is 12. The principal gives $12. 48+12+240=300 dollars raised.
You can do this by dividing the top number (the numerator) by the bottom number (denominator). You can use a calculator, but your pic is to blurry for me to read the problem.
So First move terms 8=3a-4
Next you calculate -3a=-4-8 then
Next you will Divide both sides by -3
-3a=-12 then your answer would get a=4