A desalination process is removing salt from a container of sea water. The amount of salt, in kilograms, remaining t hours after the cleaning process began is given by
?
.
?
How much of the salt is removed from time 
to time 
?
?
A. 5.73 kilograms
B. 4.17 kilograms
C. 9.70 kilograms
D. 6.02 kilograms
Answer: C
Mathematics
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What are two lines which intersect and form right angles called?
A. perpendicular B. straight C. intersecting D. parallel E. none of these
Mathematics
Use the pH scale to answer the question.What is the pH of a solution with a hydrogen ion concentration of 0.01 mole per liter? Is this solution an acid or a base?
A. pH = 7; neutral B. pH = 8; base C. pH = 3; acid D. pH = 2; acid
Mathematics
Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Mathematics
Evaluate.2? 7 - 5(3)3 ÷ (-3)
A. 59
B. 
C. -81
D. 1139
Mathematics