What is the general term equation, an for the arithmetic sequence 13,9,5,1 and what is the 21 term

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2