If a(x) = 2x - 4 and b(x) = x 2, which of the following expressions produces a quadratic function? i. (ab)(x)
ii. (ab)(x)
iii. (a−b)(x)
iv. (a+b)(x)

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Consider the graph of the exponential function y=3(2)×

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%