What is the mean of the data set below?

12, 15, 10, 11

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Verify the Identity: sin x+3π2 = -cosx

In a group of 75 fourth graders, 20% do not like hot chocolate. How many students like hot chocolate

Domain and range of f (x) = - 5x + 4

A cone-shaped container is filled with liquid. The container has a radius of 60 cm and an height of 210 cm. The liquid is drained from the container at a rate of 1099 cm3 per hour. How many hours will it take to drain all of the liquid? Use 3.

When two fair dice are rolled, what is the probability of getting a sum of 7, given that the first die rolled is an odd number?

Elmer deposited $2250 into a savings account that pays annual simple interest at the end of seven years he earned $157.50 in interest what is the interest rate on a savings account round to the nearest 10th of a percent

The ratios of the number of red marbles to the number of green marbles in a bag is 2:3. The ratio of the number of green marbles to the number of blue marbles is 9:4. There are 76 marbles in the bag. Find the number of red marbles in the bag?

What is 24 (a-41) + 65 - 14

7,500,000,000 is what percent of 10,592,400,000

A new drug store is being built at the coordinates (6, 10). Is there a street parallel to (the street) that will go to the drug store? If not, what is the equation needed to put this street on the map?