What is the interval notation for these phrases ?

The graph below could be the graph of which exponential function?

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?