Plz help Let U = {1,2,3,4,5,6,7,8} A = {2, 3, 4, 5} B = {3, 4, 5, 6} C = {4, 5, 6, 7} Find: (a) A U B (b) A U C (c) A’ (d) B’ (e) A – B

Asphere has a diameter of 10 in. what is the volume of the sphere?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?