The product of a non zero rational number and a irrational number is always sometimes or never irrational

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume