Answer:
625 metres
Step-by-step explanation:
Given the area function expressed as a(w)=-(w-25)^2+625.
The maximum area occurs at when da/dw = 0
da/dw = -2(w-25)
0 = -2(w-25)
-2(w-25) = 0
w - 25 = 0
w = 25
Substitute w = 25 into the modeled equation;
Recall a(w)=-(w-25)^2+625.
a(25)=-(25-25)^2+625
a(25) = 0+625
a(25) = 625
Hence the maximum area possible is 625 metres
Answer:
use proportions??
Step-by-step explanation:
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this i am only in 5th grade yikes
Here u go :) hope it helps
Answer:
b = -5
Step-by-step explanation:
Let's figure this equation, step by step.
-3b + 8 = 38 + 3b
<em>Step 1: Subtract 3b from both sides. This cancels out the addition by 3b.</em>
-3b + 8 - 3b = 38
<em>Step 2: Combine -3b and -3b to get -6b.</em>
-6b + 8 = 38
<em>Step 3: Subtract 8 from both sides. This cancels out the addition by 8.</em>
-6b = 38 - 8
<em>Step 4: Subtract 8 from 38 to get 30.</em>
-6b = 30
<em>Step 5: Divide both sides by -6. This undoes the multiplication by -6.</em>
b = 30/-6
<em>Step 6: Divide 30 by -6 to get -5.</em>
b = -5
Let's check our work by substituting -5 for b in the equation above.
-3(-5) + 8 = 38 + 3(-5)
15 + 8 = 38 + (-15)
23 = 23
Both sides are the same, so b = -5.
