How many liters of 15% acid and 33% acid should be mixed to make 40 liters of 21% acid solution?

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Which of the following represents the length of a diagonal of this trapezoid?