Solve the problem.How much pure acid should be mixed with 4 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 2 gal
B. 10 gal
C. 16 gal
D. 6 gal
Answer: D
Mathematics
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Multiply and simplify.18 
A. 
B. -162
C. -2
D. 2
Mathematics
Express the polynomial in descending order. If the polynomial is already in descending order, so state.6x2 + 5
A. 11x2 B. 6x2 + 5x C. 5 + 6x2 D. already in descending order
Mathematics
Graph.f(x) = -
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.If a rock falls from a height of 80 meters above the ground, the height H (in meters) after t seconds is approximately 
where 
What is the height of the rock after 2 seconds? Round your answer to the nearest tenth.
A. 60.4 meters B. -16.04 meters C. 300.4 meters D. 70.2 meters
Mathematics