Problem 791

What quantity of a 80% acid solution must be mixed with a 30% solution to produce 300 mL of a 50% solution?   Solution:- 120  

Problem 786

Kiran drove from Tortula to Cactus, a distance of 273 mi. She increased her speed by 5 mi/h for the 396 mi trip from Cactus to Dry Junction. If the total trip took 16 h, what was her…

Problem 785

A salesman drives from Ajax to Barrington, a distance of 152 mi, at a steady speed. He then increases his speed by 14 mi/h to drive the 183 mi from Barrington to Collins. If the second…

Problem 784

An antique table in value according to the function v(x) = 650(1.07)x dollars, where x is the number of years after 1980. A)     How much was the table worth in…

Problem 783

A random variable represents the number of successes in 30 Bernoulli trials, each with probability of success p =0.5. A)     Find the mean and standard deviation of the random variable.…

Problem 782

If a true-false test with 15 questions is given, what is the probability of scoring A)     Exactly 80% just by guessing? B)      80% or better by just guessing?   Solution:-…