I just need someone to check my answers, I did all the work but I'm not sure even though I checked my work 3 times but that's not the point. (sorry I talk too much ;-;)

1. Which of the following represents a unit rate?

A. 4$-12 books.
B. 5pages-2 minutes.
C. 80beats-1 minute.
D. 72inches-2 yards.

2. A nonstop flight from Albuquerque, NM to Atlanta, GA takes 3 hours. If the plane flies a total of 1,269 miles, what is the Planes unit rate in miles per hour?

A. 3,807 mph
b. 1,266 mph
c. 432 mph
d. 423 mph

3. Three different bags of Pretzels are sold at the store. Which bag of pretzels is the best buy?
Bag A: 10 ounces for $1.10
Bag B: 12 ounces for $1.38
Bag C: 6 ounces for 0.84

A. Bag A
B. Bag B
C. Bag C
D. Bag A and Bag B are equally good values

4. Samantha types 40 words per minute. How many words can Samantha type in 8 minutes?

A. 48 words
B. 240 words
C. 320 words
D. 360 words

5. How many miles can a car travel on 15 gallons of gas if it travels 28 miles on 1 gallon of gas?

A. 43 miles
B. 270 miles
C. 405 miles
D. 420 miles

My answers:

1. D. 72inches-2 yards
Reason: I kinda guessed on this one

2. D. 423 mph
Reason: 3/1,269, 3 doesn't go into 1 so change that to does 3 go into 12? Yes, 4 times because 4 * 3 is 12 so put the 4 on top of the 2 and times 4 * 3 which again is 12 so 12 - 12 = 0 so then bring the 69 now and 3 goes into 69, 23 times so the answers is 423 I believe.

3. D. Bag A and Bag B are equally good values
Reason: I uh guessed on this one too because I don't have a clue what the answer is

4. C. 320 words
Reason: I timesed 40 by 8, 8 times 0 is 0, 8 times 4 is 32 put the so the answer is 320 I hope

5. D. 420 miles
Reason: 28 times 15, 8 times 5 is 40 so put the 0 under the 5 and put the 4 over the 2, 5 times 2 +4 is 14 so the first number is 140. put a 0 under the first 0 because we don't use that spot anymore, 1 times 8 is 8 and 1 times 2 is 2 so the second number is 280, 280 + 140 = 420. 0 + 0 = 0, 8 + 4 = 12, add the one to the hundered place so 2 + 1 + 1 = 4.