Example
Annette needs 20 gallons of water with
a 3.5% salt concentration for her fish
tank. She has a 2% salt solution and
a 10% salt solution. How many gallons
of each solution does she need for
her tank?

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?