**Answer:**

z=2.61

**Step-by-step explanation:**

**Answer:**

The 1st and the last options

**Step-by-step explanation:**

5:10 can be simplified to 1:2. Other figures that fit this ration are A, or 2:4, and D, or 4:8.

**Answer:**

About 1/4 scored higher and 3/4 scored lower

**Step-by-step explanation:**

84 is on the **right side line**

Each line represents 25 % of the score

It is 75 percent ( 3 lines) of the way

She scored higher than 75% of the students and lower than 25% of the students

About 1/4 scored higher and 3/4 scored lower