How do I calculate the area

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.