Provide an appropriate response.Find AC. Round to four significant digits. 
A. 43.86
B. 78.43
C. 8.853
D. 37.35
Answer: D
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Write an algebraic equation and use it to solve the problem.A chemist needs 9 liters of a 50% salt solution. All she has available is a 20% salt solution and a 70% salt solution. How much of each of the two solutions should she mix to obtain her desired solution?
A. 4.5 liters of the 20% solution; 4.5 liters of the 70% solution B. 1.8 liters of the 20% solution; 7.2 liters of the 70% solution C. 2.7 liters of the 20% solution; 6.3 liters of the 70% solution D. 3.6 liters of the 20% solution; 5.4 liters of the 70% solution
Perform the indicated operations. Simplify the answer.
A. -3 B. 3 C. 3i D. -3i
Choose the most reasonable unit of measure.An apple: 363 
(mg, g, or kg)
A. mg B. g C. kg
Find the perimeter of the figure.A rectangle 9 yd × 15 yd
A. 270 yd B. 24 yd2 C. 48 yd D. 36 yd2