What is 0.00498 rounded to 1 significant figure

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

What is the base of 1/9 to the power of 2

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.