Which of the following is not a quadratic equation? a. a=ax^2+bx=0 b. 3x^2=-4x-1 c. x^2=5 d. x^2+3x-2=x^2-2x

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.