Final answer:
The student should receive a score higher than 16 in Mathematical Concept.
Step-by-step explanation:
The 70th percentile in this situation means that the student performed better than 70% of the other students who took the math test. Since 70% of students answered 16 or fewer questions correctly, it means that this student answered more than 16 questions correctly. Therefore, the student should receive a score higher than 16 in Mathematical Concept.