Do you guys know how to do 4.91 divided by 34.93

Anyone know? will mark brainliest if correct!

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.

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a