Question 715694: #1 How much water must be boiled away to increase the concetration of 300 gallons of a saltt solution from 2% to 3%?
#2a mixture of candy is made to sell 89 cents per pound. If 32 pounds of candy, selling for 80 cents per pound, are used along with 12 pounds of more expensive candy, find the price per pound of the better candy?
#3 Two truck drivers leave a warehouse traveling in opposite directions, one driving at 50 mph and one driving at 56 mph. If the slower driver has a 2-hour head start, how long will it take for them to be one-quarter of a mile apart?
#4 a bus driver wants to earn $3,500 per year in supplemental income from an inheritance of $40,000. If the driver invests $10,000 in a mutual fund paying 8%, what rate must he earn on the remainder to achieve his goal?
#5 paul split an inheritance between two investments, one paying 7% annual interest and the other 10%. He invested twice as much in 10% investment as he did in the 7% investment. If his combined annual income from the two investments was $4,050, how much did he inherit?
Answer by josgarithmetic(39617)   (Show Source):
You can put this solution on YOUR website! You are stacking too many different questions into one request for help but I will help with #2.
#2a mixture of candy is made to sell 89 cents per pound. If 32 pounds of candy, selling for 80 cents per pound, are used along with 12 pounds of more expensive candy, find the price per pound of the better candy?
Available candies are 32 pounds for 80cents per pound and 12 pounds at unknown price. Wanted is mixture for 89 cents per pound.
Let e = price per pound of the expensive candy.
The left side is in cents per pound and the right side is also cents per pound.
Solve for e, price of the expensive candy to use in the mixture.
A little advice on #4,
Find 8% of 10000. That would likely be for one year. What is the difference between this and the $3500?
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