Which of these sets of ordered pairs below does not represent a function? {(1, 1) (2, 2) (3, 3) (4, 4) (5, 5)}
{(2, 1) (4, 2) (6, 3) (8, 1) (10, 2)}
{(0, 0) (2, 3) (3, 6) (2, 9) (6, 12)}
{(1, 5) (2, 4) (3, 3) (4, 2) (5, 1)}

Which statement about the relative areas of ? abc and ? xyz is true? the area of ? abc > the area of ? xyz the area of ? abc < the area of ? xyz the area of ? abc = the area of ? xyz more information is needed to compare.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?