Which of the following best describes the front and back covers of a notebook when closed? Skew planes
Skew planes

intersecting planes
intersecting planes

a single plane
a single plane

parallel plane

Can someone me and do the problem plz so i can understand it more better

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Jalen charges $25.50 for every 3 hours of yard work he does for his neighbors. ralph charges $34 for every 4 hours of work that he does. who charges less? opinions: 1.they charge the same amount 2.jalen 3.ralph