Michael makes lemonade using a ratio of 10 cups of water to 1 cup of lemon juice. Which equation could be used to find c, the number of cups of lemon juice that Michael should use with 15 cups of water?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

What is the number 321,000,000 in scientific notation? also what is the number? ?