Answer:
Step-by-step explanation:
Expand brackets.
Apply radical rule : 
23-9= 14
14 divide by 2 = 7
so 7 baseball cards in a packet
We need the radius to find the surface area. Since we have the circumference we can use that to find the radius.
C = 2πr
23 = 2(3.14)r
23 = 6.28r
23/6.28 = r
3.66 = r
Now use the radius to find the surface area.
SA = 4πr²
SA = 4(3.14)(3.66)²
SA = 168.33
Surface area is C. 168 cm²
Hope this helps :)
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➷ Convert from feet to inches:
9.75ft = 117 inches
Divide the values:
117/8 = 14.625
You can cut out 14 8 inch pieces
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➶ Hope This Helps You!
➶ Good Luck (:
➶ Have A Great Day ^-^
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