Bob is looking at a helicopter that is flying 1,000 feet above the ground. bob is 1500 feet from the helicopter. what angle of elevation is bob looking at the helicopter?

Ten times the square of a non-zero number is eqaul to ninety times the number

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

Four quarts of a latex enamel paint will cover about 200 square feet of wall surface. how many quarts are needed to cover 98 square feet of kitchen wall and 52 square feet of bathroom wall