Which formula should be used to find the circumference of a circle? C = pi d C = 2 pi d C = pi r C = StartFraction pi over d EndFraction

A scale model of a human heart is 196 inches long. the scale is 32to 1. How many inches long is the actual heart? your answer to the nearest whole number

Solve for x: 8x-7=5 (x-2)

900 is 1/10 of 9000?

One out of ten divided by 250 over 1 equals

What are the excluded values of x for x+4/-3x^2+12x+36

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.