2 questions what is r(x)= 2 square root of x s(x)= square root of x (rs)(4) = ?

what is (r/s)(3)= ? the slash is for a fraction

Find and simplify the difference of the golden ratio and its multiplicative inverse

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?