**Question 21 – “In the rectangular coordinate system above….”**

OG Explanation is fine.

**Question 22 – “A certain population of…..”**

OG Explanation is fine.

**Question 23 – “How many….”**

OG Explanation is fine. Alternatively, if a car travels at 400 miles per hour, it travels 100 miles per every 15 minutes. Thus, to travel 120 miles, it would take more than 15 minutes. Only answer choice E works here.

**Question 24 – “If the perimeter…”**

OG Explanation is fine. Alternatively, you could just go directly to the answer choices. There is no need to do quadratics. Let x be the longer side and y with shorter. 60=xy. If we start with choice C, x=10, y=6; perimeter = 10+10+6+6=32. Then try D as we need more perimeter for the same area, x=12, y=5; perimeter =12+12+5+5=34

**Question 25 – “A certain manufacturer…”**

OG Explanation is fine.

**Question 26 = “In a poll of 66,000….”**

OG Explanation is fine.

**Question 27 – “3/100 +….”**

OG Explanation is fine.

**Question 28 – “If the number n…”**

OG Explanation is fine. Remember, Revenue = Price x Quantity

**Question 29 – “Which of the ….”**

OG Explanation is fine. Alternatively, you might recnize .0625 is one half of 1/8. One-half of 1/8 is 1/16.

**Question 30 – “In the figure above…”**

OG Explanation is fine.