Solve the problem.Find the distance an object has fallen after 5 seconds. Use the formula t = 
, where t is the time in seconds that it takes an object to fall a distance of h feet.
A. 100 ft
B. 8.94 ft
C. 400 ft
D. 0.56 ft
Answer: C
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Solve the problem.Suppose that the dollar cost of producing x radios is 
Find the marginal cost when 40 radios are produced.
A. $14 B. $1480 C. -$1480 D. $46
The nurse has 2.82 liter(s) of a solution that is 42.4% alcohol. How many liters of pure alcohol must she add to bring the solution up to a 78.4% concentration? ? Please enter your answer as a number without the units. Round your answer to the nearest tenth.
Fill in the blank(s) with the appropriate word(s).
Evaluate. Round dollar amounts to the nearest cent and other answers to the nearest thousandth when necessary.130ert for t = 6 and r = 2%
A. $181.43 B. $2611.12 C. $146.57 D. $353.38
Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. -10 B. -4 C. 4 D. 10