12. Write a numeral equivalent to seventy-nine using the following numeration systems:
a. Egyptian
b. Roman
c. Hindu-Arabic

What is the lcm of 16 and 40 ? 24 and 40 ?

Acontainer holds 0.7 liters of oil and vinegar. 3/4 of the mixture is vinegar. how many liters of oil are in the container? express your answer as both a fraction and a decimal.

In chemistry,n molecules of an ideal gas have pressure, volume, and tempersture that stand inthe following relation, where r is constant. solve the equation for n,the number of molecules. pv=nrt