Which relation is also a function? A, B, C, D

2-digit numbers less than 91 which are 1 less than a multiple of 10

3.4a=57.8 what is the the value of a

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