What are the types of roots of the equation below?

x^4 - 81=0

Four complex

Two complex and two real

Four real

In a recent year 36% of all college students were enrolled part time. If 6.2 million college students were enrolled part time that year what was the total number of college students. Round to the nearest million

9 x 27 + 2 x 31 - 28 = n

Bella pushes a box to her right. In which direction does the box need to move for Bella to have done work n on it

A parallelogram has a 70 degree angle and sides 6 cm and 10 cm long. How long are its diagonals?

Numbers such as 1, 4, 9, 16, and 25 are called

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.