The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 F
1 answer:
Answer:
After 8 minutes will the temperature be 138.1 F
Step-by-step explanation:
Given that:
The water has been on the stove .....[1]
where
y represents the temperature in Fahrenheit(F)
x represents the time in minutes.
We have to find after how many minutes will the temperature be 138.1 F.
⇒y = 138.1 F
Substitute the given value in [1] to solve for x;
Subtract 62.1 from both sides we get;
Divide both sides by 9.5 we get;
8 = x
or
x = 8 minutes.
Therefore, after 8 minutes will the temperature be 138.1 F
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Answer:
781250
Step-by-step explanation:
Let y is the length of the farm field
Let x is the width of the farm field
Given that, no fencing is necessary along the rock wall, so we can find the perimeter of the farm is:
2x + y = 2500 feet
<=> y = 2500 -2x
The are of the farm has the following formula:
A = x*y
<=> A = x(2500 - 2x)
<=> A = 2500x -2
To have the maximum area of field in square feet, we need to use differentials to estimate:
= 2500 - 4x
Set = 0, we have:
2500 - 4x = 0
<=> x = 625 feet.
=> y = 2500 - 2*625 = 1250 feet
So the maximum area of field is:
A = x*y = 625*1250 = 781250