Solve the problem.The number of acres in a landfill is given by the function 
where t is measured in years. How many acres will the landfill have after 5 years? (Round to the nearest acre.)
A. 5452 acres
B. 4921 acres
C. 6386 acres
D. 12,554 acres
Answer: C
Mathematics
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Simplify the expression. Assume all variables represent nonnegative real numbers.
A. 
B. 
C. 
D. 
Mathematics
Solve the system by substitution. -4x + 8y = 56 x + 7y = 49
A. No solution B. (0, 7) C. (1, 6) D. (-7, 0)
Mathematics
Solve the equation.-3a + 3 + 4a = 7 - 23
A. -19 B. -33 C. 33 D. 19
Mathematics
Heights (in inches) obtained by a group of people in a random survey is reported in the table. What is the expected height (in inches)? HeightsProbability550.007600.024650.112700.357750.357800.112850.024900.007?
A. 80 in. B. 78.3 in. C. 78 in. D. 71.8 in. E. 72.5 in.
Mathematics