What is the missing number in the line 415,418,423,427,430

Luke wants to reduce the area of his rectangular garden by 1/4 the expression 14/w can be used to represent this change. what is another way to write this expression?

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.