Can somebody help me with this one section of the question, please.

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

(60 points) explain this in detail

The school board administered a math test to all students in grade 66 at high achievers charter school and determined that 15\%15% of them were below grade level in math. based on this data, which of the following conclusions are valid? choose 1 choose 1