12 tenths plus 9 tenths

The specific heat of glass is 0.840 J/g*°C, the specific heat of water is 4.184 J/g*°C and the specific heat of iron is 0.450 J/g*°C. Identify the correct statement.

Find the surface area of an open-top box with length 9 cm, width 6 cm, and height 10 cm.

This sphere has a diameter of 12 meters. What is its exact surface area and its exact volume? Show the formulas and show your work.

If the rule of the function is "multiply by 2 then add 3" and the input value is - 2, what is the output value

Enter a positive common factor (other than 1) of 15 and 10

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.