Lisa evaluated the expressions 2x and x^2 for x=2 and found that both epressions were equal to 4. lisa concluded that 2x and x^2 are equivalent expressions. how could you show lisa that she is incorrect?
190 points

What is the correlation coefficient for the data? don't forget to turn the diagnoisticon (in the catalog menu of the calculator). r = answer (round to the nearest thousandth)

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.

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9