Write the expression with positive exponents only. Then simplify, if possible.-2-4
A. 
B. 16
C. - 
D. -16
Answer: C
Mathematics
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Solve the problem.How many liters of a 70% alcohol solution must be mixed with 60 liters of a 90% solution to get a 80% solution?
A. 6 liters B. 120 liters C. 60 liters D. 12 liters
Mathematics
Write the percent in decimal format.67%
A. 0.56 B. 0.067 C. 0.67 D. 6.7
Mathematics
Information is given about a polynomial f(x) whose coefficients are real numbers. Find the remaining zeros of f.Degree 5; zeros: 1, i, -2i
A. -1, -i B. -1, 2i C. -1, -i, 2i D. -i, 2i
Mathematics
Solve.If a tree 42.5 feet tall casts a shadow that is 17 feet long, find the height of a tree casting a shadow that is 7 feet long. Round to the nearest tenth if necessary.
A. 2.8 feet B. 103.2 feet C. 32.5 feet D. 17.5 feet
Mathematics