Help me pls, and quick.

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%

Write the factored form of this trinomial 9x^2+18x-7

How many significant figures are there in the number 10.76?