What is the circumference and area of this circle? (Use 3.14 for pi)

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

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.

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25