Which of the following statements is true about the number 3/20

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?