Which part of the circle is labeled? 608 cm a) the radius b) the diameter​

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)