Answer:
24
Step-by-step explanation:
Lets start by working out 80% of 30
80% x 30=24
so the student answered 24 questions correctly
The median of the data set it 40.5
Answer:
C- -15
Step-by-step explanation:
f(-5) = f(x)
the value of x = -5
Therefore
f(-5) = -15