Find the range of the data. scores: 83, 77, 88, 93, 97, 79, 94, 80, 97, 81 21 20 19 23

Can any one me with the answers to these questions asap?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.