PLEASE HELP!

In the figure below, △ABC is similar to △FED. Find the length of BC. (line on top of BC)

A. 7.5 cm
B. 8 cm
C. 9 cm
D. 10 cm
E. 4.5 cm

In pqr the obtuse angle is 105 and the shorter sides measure 4 and 7 units rounded to the nearest tenth what is the area of triangle pqr

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)