What is the following difference?

11/45 - 4.5

Write 0.0000000068 in scientific notation.

The length of a diagonal of a square is 8 mm. Find the perimeter of the square. 15.39 mm 22.8 mm 7.7 mm 32 mm

Determine the value z * that satisfies the conditions below. (Round all answers to two decimal places.

What is 16,500 rounded to the nearest 10,000 ft

50 plums cost $25. How much would 75 plums cost.

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.