Acalculus student takes a 20-question, multiple choice test with 5 answer choices for each question. find the probability of getting at least 70% of the questions correct?

The triangles are similar. what is the value of x? show your work.

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours