What is the circumference of a circle with a diameter of 85 feet?

(use 3.14 for pi.)

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)