The rope tied to the tree will make a triangle.
The height of the triangle = 180cm
The base of the triangle = 200cm
to find how much rope you need, work out the hypotenuse using Pythagoras:
180^2 + 200^2 = 72400
√72400 = 269.0724809
This is the length of rope he needs, however you need to +30 as this is what he will need when he ties the rope:
269.0724809 + 30 = 299.0724809
299.0724809 is less than the 270cm of rope he has, so he would need more.
Answer:
it`s acute because the angle is less than 90 degrees
The answer is C) 16 blocks.
We will use the distance formula for this problem:

From your house to the internet cafe:

From the internet cafe to your friend's house:

Together, we have 10.2+5.7=15.9, which rounds to 16 blocks.
One pound bag cost $1.10
2 pound bag cost $1.98 which is .99 per pound
3 pound bag cost $2.85 which is .95 per pound
The more amount you buy the cheaper it is per pound.