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A chemist has a 2000 gallon vat that contains 800 gallons of a solution that is 60% water and 40% acid. She is going to add x gallons of a 75% acid solution to the vat.
Write the concentration, C, of acid as a function of x
Probability: Working with the standard distribution curve. A company installs 5000 light bulbs, each with an average life of 500 hours and a standard deviation of 100 hours, and a distribution approximated by a normal curve
If 5 J of work are needed to stretch a spring from 10 cm to 11 cm and 7 J are needed to stretch it from 11 cm to 12 cm, what is the natural length L of the spring?
Probability that Lounging Larry wins the horse race. The odds against Lounging Larry winning the horse race are 5:12.
Given 2 variable of initial value of Pint*Vint obtain final value of Pfinal*Vfinal after undergo an infinitesimal changes.
jan had a beaker that contained 104 mL of acid and 783 mL of water. What percent of this total mixture is acid?
Fred invests $3000 more in an account that pays 4% simple interest than he invests in an account that pays 3% simple interest. If the total interest earned for the first year is $610, how much did Fred invest in each account?
A rectangle is formed from a square by adding 6 m to one side and 3 m to the other side. The area of the rectangle is 238 m squared. Find the dimensions of the original square.
A lottery has one 2000.00 prize, two 1000.00 prizes and ten 500.00 prizes. Two thousand tickets are sold at 5.00 each. Find the expectation is a person buys two tickets?
Determine the probability without replacement
A consulting engineer's time is billed at $30 per hour, and her assistant's is billed at $20 per hour. A customer received a bill for $715 for a certain job. If the assistant worked 3 hours less than the engineer, how much time did each bill on th..
A ball is kicked upward with an initial velocity of 56 feet per second. The ball's height h (in feet) can be expressed as a function of time t (in seconds) by the equation h = -16t2 + 56t. How much time does the ball take to reach its highest poin..
Which of the following can be solved by using a system of equations? Laura and Mark went to the movies and spent $29 on movie tickets and snacks. Mark paid $10 more than Laura. How much did each spend?
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