What do heating systems cooling systems and heat engines have in common

in a group of 40 student students, the probability that at most 15 of them like to hike? A 44% B 64% C 55% D 38%e to hike is 36%. What is the probability that at least 16 of them like to hike

Joann is looking at a map. The map shows that two towns are 13.5 inches apart. If the scale factor for the map is 1.25 inch = 10 miles, how far apart are the two towns actually?

What is the domain of the function below? (-2,5) (-1,10) (4,5) (2,6)

Tell whether the number is prime or composite 68,52,63, 75, 31, 77, 59, 87

What fraction of a century is one year

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.