PLEASE HELP The aquarium estimated that they would need 520 cubic feet of water for a new exhibit. They got more fish than expected and actually needed 620 cubic feet of water. What was the percent error between the actual amount needed and the estimate?

P. S its not multiple choice

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?