The normal monthly rainfall at the Seattle-Tacoma airport can be approximated by the model R = 3.121 + 2.399sin(0.524t + 1.377), where R is measured in inches and t is the time in months. Use the model to approximate the normal yearly rainfall. (Hint: the interval [0, 12] represents 1 year.)

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field