Railroad tunnel is shaped like a parabola: the height of the tunnel at the center is 54 ft and the vertical clearance must be 18 ft at a point 8 ft from the center.
find an equation for the parabola

What are the domain and range of the functiony = 2(x - 3)2 + 4?

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.