Answer:
1. 89/112 2. 32/39
Step-by-step explanation:
Answer:
Sara expect the better grade for Math class.
Step-by-step explanation:
Consider the provided information.
On the Math exam, the mean was µ = 30 with s = 5, and Sarah had a score of X = 45.
Z score for Math: 



On the Spanish exam, the mean was µ = 60 with s = 8 and Sarah had a score of X = 68.
Z score for Spanish: 



On the English exam, the mean was µ = 70 with s = 8 and Sarah had a score of X = 70.
Z score for English: 


We can observe that Z score of Math is greater than Spanish and English.
Which means that Sarah did the best in her Math exam.
Hence, Sara expect the better grade for Math class.
Answer:
It’s 5
Step-by-step explanation:
.75 Rounded to the nearest thousandth would be 0.750
4.5 litres of fruit punch with 0.5 litres of water.
13.5 /4.5 = 3. Multiply 0.5 by 3 to get 1.5 litres of water. Therefore, 13.5 litres of fruit punch concentrate needs 1.5 litres of water. 13.5 + 1.5 = 15 litres of fruit punch in total.