Dashawn bought a cd that cost 18.99 and paid 20.51 including tax what was the percent of tax he paid

Evaluate the expression. (9 + 5)(3 + 2)0

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%

Find the zeros of each function. f(x) = x^2 + 5x - 6