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DedPeter [7]
2 years ago
11

consider a wire 2 ft long cut into two pieces. one piece forms a circle with radius r and the other forms a square with side len

gth x. (a) determine a formula for the radius r in terms of x .
Mathematics
1 answer:
makkiz [27]2 years ago
4 0

The formula for the radius r in terms of x . and for the maximum areas is x=2/\pi+4

Given that,

y forms a circle of radius r

y=2\pir

r=y/2\pi

(2-y)- forms Square Side x

(2-y) = 4x

x=(2-y)/4

Now Sum of Area's=Area of Square +Area of Circle

Sum = \pir² + x²

Substitute the r and x values in above equation,

A(y)= y²/4\pi+(y-2)²/ 16

To maximize Area A(y)

A'(y)= 0

2y/4\pi + 2(y-2)/16 =0

y/2\pi + (y-2)/8 =0

y = 2\pi/\pi+4

Y max will be max, x to be maximum.

for maximum sum of areas,

x=2/\pi+4

Hence,The formula for the radius r in terms of x . and for the maximum areas is x=2/\pi+4

Learn more about Area :

brainly.com/question/28642423

#SPJ4

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Answer:

The percent error in Isabel's measurement is <u>12.5%</u>.

Step-by-step explanation:

Given:

Isabel thinks she has space for a 45 inch wide bookcase it turns out she only has space for a 40 inch wide bookcase.

Now, to find the percent error in Isabel's measurement.

Measurement she thinks = 45 inch.

The actual measurement = 40 inch.

<u><em>So, the error in measurement</em></u> = 45-40=5\ inch.

Now, to get the percent error of the measurement:

\frac{5}{40} \times 100

=\frac{500}{40}

=12.5\%.

Therefore, the percent error in Isabel's measurement is 12.5%.

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