Answer:
6 pounds of fertilizer.
Step-by-step explanation:
We can solve this problem using rule of three:
Anna needs to use 4 pounds of fertilizer for each 120 square feet of soil. With that values, we make the first fraction: 4/120
Now, she needs X pounds of fertilizer for 180 square feet of soil. The fraction now is X/180
Then, we need to make the first fraction equal to the second, and then find the value of X:
4/120 = X/180
X = 4*180/120 = 6
So Anna will need 6 pounds of fertilizer.
Another way to solve this problem is calculating the amount of soil for one pound of fertilizer:
If 4 pounds of fertilizer is necessary for 120 square feet of soil, 1 pound is necessary for 120/4 = 30 square feet of soil.
If we have 180 square feet of soil, we divide 180 by 30 to find the amount of fertilizer necessary:
180/30 = 6 pounds of fertilizer.
6:7....added = 13
6/13(91) = 564/13 = 42
7/13(91) = 637/13 = 49
ur 2 numbers are : 42 and 49
X^2 = 17^2 - 8^2
x^2 = 289 - 64
x^2 = 225
x = 15
hope it helps
Answer:
A=20,000 m2 per year
Step-by-step explanation:
we have that Volume (V) =300,000 m3, so V=A*h, where A=area (m2) and h=15m
V=A*h ⇒ 300,000m3=A*15m ⇒ A=300,000m3/15m ⇒ A=20,000 m2