Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 2. (input decimals only, such as 12.71, as the answer.)

At least two people have the same birthday in a school of 150 students

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?