If you are having trouble with ratios you can look at them as fractions. The first number being the numerator and the second number being the denominator or the other way around. When you are asked to find an equivalent ratio, you just have to find an equivalent fraction.
A(-7,-4) B(-2,0)
√[(x'-x)^2+(y'-y)^2]
√(-2-(-7)^2+(0-(-4)^2
√(5^2)+(4^2)
√25+16
√41
the distance is approximately 6.4 units
B) 405 m
tan(5) = x/4629
4629tan(5) = 404.9
Round up
x=405 m
I hope this help you I gess 16
It's the third one.
The second one is a parabola so that is not the answer. Hope I helped :)