15 is 40% of what number

What is the product of 8.2 * 109 and 4.5 * 10-5 in scientific notation?

Team infinite dimensions canoed 15 and 3/4 miles in 3 hours. What was their average rate of speed in miles per hour

Tracy pays $8.50 of her monthly life insurance premium and her employer covers the rest of her monthly premium is $32.25 what is the annual value to Tracey of this benefit

In a 30° - 60° - 90° right triangle, the longer leg has a length of 10 square root of 3. what is the length of the shorter leg?

Joaquin and serena are looking at the problem 3x+1>0 serena says that the inequality is always true because multiplying a number by three and then adding one to it makes the number greater than zero, is she right explain why or why not

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.