In AHIJ, the measure of ZJ=90°, the measure of ZH=15°, and JH = 54 feet. Find the length of HI to the nearest tenth of a foot.

What's the difference between: x≥0 and nonnegative integer. ?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?