Answer:
(a) 
(b) 
Step-by-step explanation:
(a) Write and simplify an expression for the exact area of the sidewalk.
(b) Find the approximate area of the sidewalk. Use 3.14 to approximate .
(a) The sidewalk area is the difference in the area of outer circle and inner circle.
Use formula 
for the area of the circle:
The difference is
(b) Use approximation 
then
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Answer:
I don't think you are asking a math question, but in my opinion you should choose a leader that you think would be responsible in a group, then tell them what the group needs to do.
Step-by-step explanation:
Answer:
the line is going to be negative
start the line on (4, -2) so you know the line will contact the point
make sure the slope is -3
i dont know how else to help
Step-by-step explanation:
-4 + -3 = -7 Hope this helps!
