B=t-am is the correct answer:)
Answer:36 square inches
Step-by-step explanation:
The measure of angle EAC is equivalent to 50 degrees.
42/12 = 3.5, 63/18 = 3.5, therefore we will be multiplying the last time by 3.5. 40x3.5= 140, and therefore, the number of pencils produced in 40 seconds is 140