3,9,6,9,27,24,27,81,78,81,243,? find out last figure to complete series

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse