Answer:
Step-by-step explanation:
assuming that x2 = x², then the equation is y= x²-18
y= x²-18
y-18=x²


so x = 
Answer: the y-intercept is (0,4)
Step-by-step explanation:
Answer:
79,514
Step-by-step explanation:
1 foot = 12 inches
Therefore:
2 feet = 24 inches
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2 feet x 725 = 1450 feet
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The real tower is 725 times taller than the actual model.
Ratio:
725 : 1