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Maths Puzzle
Numerical Ability
How many liters (L) of a 10% silver iodide solution must be mixed with 7 L of a 4% silver iodide solution to get a 6% solution?
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book Other Question
Explain the process and show EACH step in the process of simplifying the following problems:
a. sqrt13 · sqrt5
b. sqrt5 · sqrt7 · sqrt3
c. sqrt3(sqrt3 + sqrt5)
the value of a building lot this year is $78,000. this is three times its value 18 years ago. find its value 18 years ago.