Abox of 24 greeting cards is sold at a gift shop for $3.00. the cost to the store is $2.40. what is the markup as a percentage of cost?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?