1.if the centroid of a triangle abc is the origin, point b and c are respectively ( 0,6,0 ) and ( 0,0,6 ) then the point a is a. ( 0,-6,0) b. ( 0,0,-6) c. ( 0,6,6,) d. ( 0,-6,-6)
2. the ratio in which the line joining the points ( a, b,c ) and ( -a,-c,-b ) is divided by the xy plane is :
a. a: b
b. b: c
c. c: a
d. c: b

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