Question 739678
Write the standard equation for each Hyperbola. 
1. x^2 - 100y^2 = 100
Equation: {{{x/100-y^2=1}}}
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2. 4y^2 - 25x^2 = 100
Equation: {{{y^2/25-x^2/4=1}}}
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3. vertices (-6, 0) ( 6, 0) and 
focus (-8, 0) ( 8, 0)
center:(0,0)
a=6
a^2=36
c=8
c^2=64
b^2=c^2-a^2=64-36=28
Equation:  {{{x^2/36-y^2/28=1}}}
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4. vertices ( 0, -12) ( 0, 12) and 
co-vertices (-11, 0) (11, 0)
center:(0,0)
a=12
a^2=144
b=11
b^2=121
Equation: {{{y^2/144-x^2/121=1}}}