18998 rounded to the nearest ten thousand

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

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%

How do i put 3(x+7) in distributive property