Answer:
D) 20 in
Step-by-step explanation:
The volume of a cylinder is given by
V = pi r^2 h where r is the radius and h is the height
Substituting what we know
980 pi = pi (7)^2 h
Divide each side by pi
980 pi /pi= pi 49 h/pi
980 = 49h
Divide each side by 49
980/49 = 49h/49
20 =h
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2. Sorry, I don't understand this problem
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Given
216 sections : 15%
want to know
X sections : 100%
Write the proportion equation
216/15 = X/100
Cross multiply
216*100=15*X
Solve for X
X=21600/15=1440
so there used to be 1440 sections.
This would be false because it will depend on the actual values of both a and b, including if they are positive or negative.
This is true.
For example :
B = -6
A = -9
A + B = C = -6 + -9 = -15.
The value is C has the same sign as B.
B = 2
A = -5
A + B = -5 + 2 = -3.
Here The sign for C does not match the sign for B, which is positive.
