It would be biased because one would assume that students can get to school by means other than those that put them 8n the parking lor. (Parking lot = car drivers who would be the only students sampled.). Others may ride to school by either parent or school bus who could drop them off somewhere else or possibly walk to school. The freshmen/sophomores would be excluded generally as they would be too young to drive altogether
Use the formula V=AbH and 48=16h will be the second step and then divide by 16 and then you get the answer
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No "x" can not be repeated, a function has one x-element and one y-element
