What is the surface area of the composite solid? 1,508 m2 1,658 m2 1,808 m2 1,958 m2

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

According to the data set, where should the upper quartile line of the box plot be placed?

What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6