The shadow of a 16 ft tree is 20 ft long. What is the angle of elevation from the ground to the sun? Round to the nearest tenth of a degree. a) 35.1
b) 38.7
c) 42.2
d) 25.9

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Ineed with number 6 , explain how to get 1978