An office building casts a shadow that is 55m long. At the exact same time, a 5m tree casts a shadow that is 1.1m long. Find the height of the office building. SHOW ALL CALCULATIONS

Please help, I can't figure this out!

The trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? a) 48 cm2; 32 cm2; 80 cm 2 b) 48 cm2; 16 cm2; 64 cm 2 c) 128 cm2; 32 cm2; 160 cm 2 d) 128 cm2; 16 cm2; 144 cm 2

Robert has 78 tomatoes and 56 cucumbers he wants to plant them in equal rows how many in each row

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.