4. There is one science lab in the high school. The biology class needs
the lab every seventh day of dass.
The chemistry class needs the lab
every fifth day of class. What is the
first day the two classes will have a
conflict?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points

Which expression is a perfect cube? a. x8 b. y24 c. m28 d. x64