A piano has 88 keys. The ratio of white keys to black keys is 13.9. How many black keys does a piano have?

For the following data set, calculate the mean and median. Any non-integer answers should be rounded to the nearest tenth. 3,5,8, 8, 12, 16, 17, 20, 24

There are 30 businesses with 4 executives each for the new office building. Each business needs one office for each of its executives. The building has 1,440 offices.

Ethan ate 4/8 of the sandwich. Andy ate 1/2 of the sandwich. the sandwiches were the same size whose sandwich had more equal parts

A hippopotamus in a wildlife reserve consumes 34 pounds of hay each day. how many pounds of hay does the hippopotamus consume in one week

3 Newton's is how many pounds on earth

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.