Bruce wants to make 50 ml of an alcohol solution with 12% concentration. He has a 10% alcohol solution and a 15% alcohol solution. Which equation can bruce use to determine how much of the 10% alcohol solution he should use?
A) 0.10x+0.15(50-x)=50+0.12
B) 0.10x+0.15(50-x)=0.12(50)
C) 0.10x+0.15(50-x)=50+0.12+0.12(50)D) (0.10x)(0.15)(50-x)=0.12(50)

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?