The temperature dropped from 90° at noon to 50° by midnight. What is the percent decrease in temperature Round your answer to the nearest whole percent and include your percent sign,

I’m stuck on this i don’t understand.

Stacey filled her 1/2 cup of measuring cup seven times to have enough flour for a cake recipe how much flour does the cake recipe calls for

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected