I'll do the first two problems to get you started. All problems shown will use the same formula.
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Problem 4
The formula to use is
C = 100*(B-A)/A
where
A = old value
B = new value
C = percent change
In this case, A = 12 and B = 36, so
C = 100*(B-A)/A
C = 100*(36-12)/12
C = 100*(24/12)
C = 100*2
C = 200%
We have a 200% increase. It is an increase because the value of C is positive.
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Problem 5
Use the same formula as in the previous problem. This time,
A = 75 is the old value
B = 25 is the new value
C = 100*(B-A)/A
C = 100*(25-75)/75
C = 100*(-50/75)
C = 100*(-2/3)
C = -66.6667%
C = -66.7%
The value of C is negative, so we have a percent decrease of roughly 66.7%
The SA formula to find a right cone is area of the base x 1/2 (perimeter)(slant height)
To find the area of the base you do radius squared x pi
Radius=11
So 121pi is area of the base
Perimeter=circumference of the circle
So perimeter=24pi
So 121pi x 1/2 (12pi)(6)
12 x 6=72pi/2=36pi
121pi x 36pi= 4356pi
Answer: 4356pi
7th graders prefer fiction is 0.75 = 75%
8th graders prefer fiction is 0.68 = 68%
7th graders is greater than 8 graders
answer
<span>A. greater than</span>
The absolute value of 21 is 21 and the absolute value of -21 is also 21.
So its D
