Scenarios of unit rates

Does area and circumference mean the same thing

What is the equation of a line if the slope is 4 and the y-intercept is (-3,-4)

A circle has an diameter of 153.86. What is the diameter?

The math department wants to sell pie slices to buy new math books. Each pie was cut into six slices. Two of the pies will be served to members of the department as courtesy.

Round $2.67 to the nearest dollar

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.