How do u do percentages

The reading speed of a second grade students in a large city is approximately normal with a mean of 92 words per minute and a standard deviation of 10 wpm.

A jar contains 0.25 liter of apple juice and 0.30 liter of grape juice. Melissa poured 0.75 liter of pineapple juice into the jar. She then drank 0.20 liter of the mixture.

Isabella makes a list of numbers that are all even. Which list could be Isabella's list? 2,3,4 23,4 3,5,9 3,5,9 2,6,8 2,6,8 3,5,6 3,5,6 Done → What the answer

At a wedding dance couples have new partners nine times during a five minute song how long does one couple dance together one couple dances toghether for _ of a minute

A survey was recently quoted to support the news that the number of the trees in the United States is increasing. Upon further research it was found that the survey was fully funded by logging company. Identify the problem with this survey A.

Devon babysits x hours a week after school for 5$ an hour, and also has a job as a cashier y hours a week for $10 an hour. He wants to earn atleast 70$. He can't work any more than 10 hours a week because of school.

Emergancy final exam! The base length of a triangle is 8 feet and the height is 4 feet. What is the area of the triangle?

4/5+2/3 i need to know the answer so i would know whats the answer.

Identify the slope of the line y=-3x - 4

Suppose you used the Distributive Property to get the expression 12x + 3y - 9. With what expression could you have started?