Nikki bought a patio set on sale for $390. The original price was $850. (a)
Find the amount of discount.
$
(b)
Find the discount rate (in %). (Round to the nearest tenth of a percent.)

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%

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?