1 : 40 = 6 : 240
On the ground the fence would be 240 inches long
240 / 12 = 20 feet long fnce
Ok so first you need to put w and x in the equation —-> 13-0.5(10)+6(1/2) and now you just solve -0.5 times 10 is -5 so 13-(-5)+6(1/2) now multiply 6 times 1/2 which is 3 so now we have 13-(-5)+3= 21
Answer:

Step-by-step explanation:
For this case we have the following value:

We can convert this first to
like this:

Now we use the fact the the pressure is defined as
, whre P is the pressure, F the force and A the area, so then
and then we can replace this:

Now from definition of work we know that
where W is the work, F the force and d the distance, so then is equivalent 
And if we replace this into the equation we got:

Answer: The correct answer is B because 0.7x=210, x=300
Step-by-step explanation:
210= 70% of the total distance to his grandfather's house, lets take that total distance for x.
So if:
210=0.7x
x=210/0.7
x=300