3/7 of the pages in the magazine contain advertisements. Given that 12 pages contains advertisements, work out the number of pages in the magazine.

Describe the relationship between the angles of similar triangles and the sides of similar triangles

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%

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle