Answer:
First one is 6 16/21
Second one is 3 14/15
Step-by-step explanation:
Answer: The percent error is -2.1352% of Jocelyn's estimate.
Answer:

Step-by-step explanation:
Area of circle:

By using the area of a circle, we can get the area of a semicircle:

Let's convert the mixed fraction to an improper fraction and then a decimal:
=
= 
Now, we solved for the diameter, to get the radius, we need to divide the diameter by 2:

Now we have the radius, so we can plug in our values and find the area:


Hello,
15 pieces of ribbon, each is 2.25 yards long.
15 x 2.25 = 33.75 yards of ribbon.
Hope this helped!