It looks like a rectangular prism
volume=W*H*L
6510=w*40*21/2
6510/420=w
w=15.5 feet
Answer:
6
Step-by-step explanation:
The ratio of 
is a constant
= 
= 
= 
That is y = x
When x = 21, then
y = × 21 = 6
Answer:
He should buy 189.47 feets.
Step-by-step explanation:
Since there's a hypotenuse this triangle is rectangular and since it's an isosceles triangle we know that both cathetus are equal. We were given the area of this triangle, wich is 4500 square feet, the equation to compute this area is A = b*h/2, since the cathetus are equal b = h and we can solve for either of this variables. So we have:
A = b*b/2
4500 = b*b/2
b*b= 9000
b = sqrt(9000) = 94.87 feet
Since the hypotenuse of this triangle already has a fence we only need to buy the fencing for the cathetus, wich should be two times b, since there are two cathetus. So the amount of fence is 2*b = 2*94.87 = 189.74 feets.
I’m pretty sure it’s the second one
