Answer:
2826 inches^2
Step-by-step explanation:
The general formula for the total surface area of a regular pyramid is
T.S.A.=12pl+B
Where p represents the perimeter of the base, l the slant height and B the area of the base.
The perimeter of the base is.
p=2L+2W
P=2*10+2*9
P=20+18
P= 38 inches
The area of the base is.
B=10*9
B=90in^2
T.S.A.=12(38)(6)+90
T.S.A=2736+90
T.S.A=2826 inches^2
Hence the paper needed is 2826 inches^2
Step-by-step explanation:

Since we need to find the radius, then we will rearrange the second formula.




So, the radius of a circle that has a circumference of 457 is about 72.8 cm
Answer:
x=15
2x-9= 21
x-6=9
Step-by-step explanation:
3x-15= 2x
x=15
2x-9= 21
x-6=9
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