7. Which is a recursive rule for the arithmetic sequence 17, 13, 9, 5? A (1) = 17; f(n) = f(n-1) - 4
B f(1) = 17; f(n) = f(n-1) + 4
C (1) = 5; f(n) = f(n-1) + 4
D f(1) = 5; f(n) = f(n-1) - 4

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7