Answer:
it is about 30 times larger
Step-by-step explanation:
I know because I am related to Albert Einstein and because I'm really smart. I have 2 awards for being smart.
Answer:

Step-by-step explanation:
A suitable common denominator is 4k^2. (This eliminates the first and last choices.)

Answer: He spends more time trading stickers by 15 minutes.
Step-by-step: 1 hour is 60 minutes. So 2 hours is 120 minutes. 120 minutes plus his 20 minutes is 140 minutes. Subtract it from his homework time and he spends 15 more minutes trading stickers.
Ahh ok so split it up into two rectangles:
Rectangle one:
A=lw
A=4(12)
A=48
Rectangle two:
A=lw
A=10(2)
A=20
Add both areas up to get 68 ft squared!! :)