Mara needs to mix some 30% acid solution and some 70% alcohol solution to end up with 20 liters of 54% solution. how many liters of the 70% solution will she need? type in your numerical answer only; do not type any words or letters with your answer.

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.