Answer:
sure I'll try to help you oh math
Answer:
A. 15:25 & C. 3:5 would be the ratios that are equivalent to 60%
The formula for the light bend would be n1*sin i= n2 * sin r
If you use "sin (90-x)= cos x" principle, you can change the sin in the equation into
n1*sin i= n2 * sin r
n1 * cos a= n2 * cos b
n2/n1= cos a/ cos b
Assuming the n constant is the ratio of the glass compared to water then the answer would be: cos a/ cos b
It would be: 289*24/100 = 6936/100 = 69.36