Robert has 120 dollars in his saving account he left it in for 1 year at 3 1/2 interest how much was his interest income for that year

What is the absolute value of the complex number -4-sqrt2i

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?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x