Ying is a professional deep water free diver.
His altitude (in meters relative to sea level), a seconds after diving, is modeled by:
D(x) = 36 (2 – 60)2 – 100
What is the lowest altitude Ying will reach?
HA
meters

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.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Is the square root of 4 plus the square root of 16 rational?