true or false to find the surface area of a three dimenseional figure, you must find the perimter of a face and then multiply it by the height

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

What is the reflection image of (5,-3) across the line y = -x?

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane