So this is like a pie chart or fractions
20 degreees is x% or x/whole parts
circle=360degrees
20/360=2/36=1/18
so the area represents 1/18 of the circle
684=1/18 of circle
multply both sdies by 18
12312=18/18 circle
the area of the circle=12312 yd^2
Answer:

Step-by-step explanation:
Given

Required
The surface area
This is calculated as:

So:




Answer:
120 bpm
Step-by-step explanation:
after strenuous exercise your heart rate wouldn't decrease as your body needs more oxygenated blood causing your heart to pump harder and faster
Answer:
-2
Step-by-step explanation:
First you should write out the entire word equation into one you may recongnize:
7x - 12 = -3x - 32
After this, solve for x:
7x + 3x = 12 - 32
<u>10x</u> = <u>-20</u>
10 10
x = -2
the number is -2