Answer:
12
Step-by-step explanation:
15×0.8= 12
you're multiplying the total number of questions with the score as a decimal
Population size:9
Lower quartile (xL): 3.5
Upper quartile (xU): 7
<span>Interquartile range (xU-xL): 3.5</span>
Answer:
Step-by-step explanation:

Not sure what you’re trying to find but here’s the simplified version:
-4<=2t+5<11
-9<=2t<6
-9/2<=t<3