In the chemistry lab and experiment requires 500 mL of one ingredient to be mixed with 1000 mL of another how many ounces is the solution

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25