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Ilia_Sergeevich [38]
3 years ago
6

Suppose a student visited 81 websites while conducting research. If 9 of the websites were "us.gov" websites, what percentage of

the websites visited were NOT "us.gov" websites? Round your answer to the nearest whole percent.
Mathematics
1 answer:
rjkz [21]3 years ago
3 0

Answer:

9/81 or 1/9 = .1111111111R

Step-by-step explanation:

It is that because that is the decimal and 9 goes into 9 once and 9 goes into 81 nine times

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Jaime bought 5 pairs of baseball pants for $127.90. About how much was the cost of one pair of baseball pants? A. $25.00 B. $26.
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3 years ago
Find the maximum and minimum values attained by the function f along the path c(t). (a) f(x, y) = xy; c(t) = (cos(t), sin(t)); 0
goblinko [34]

Answer:

a) Therefore, the minimum value of the function f is -1/2.

Therefore, the maximum value of the function f is 1/2.

b)Therefore, the minimum value of the function f is 1.

Therefore, the maximum value of the function f is 16.

Step-by-step explanation:

We find the maximum and minimum values attained by the function f along the path c(t). From exercise we have:

a)

f(x,y)=xy\\\\c(t)=(\cos t, \sin t)\\\\\0\leq t\leq 2\pi\\  

Therefore, we get:

f(x,y)=xy\\\\f(x,y)=\cos t \cdot \sin t\\\\f(x,y)=\frac{1}{2} \sin 2t

We know that:

-1\leq \sin 2t\leq 1\\\\\implies -\frac{1}{2} \leq \frac{1}{2}\sin 2t\leq \frac{1}{2}\\\\\implies -\frac{1}{2}\leq f(x, y)\leq \frac{1}{2}

Therefore, the minimum value of the function f is -1/2.

Therefore, the maximum value of the function f is 1/2.

We use software to drawn a graph.

b)

f(x,y)=x^2+y^2\\\\c(t)=(\cos t, 4\sin t)\\\\0\leq t\leq 2\pi\\

Therefore, we get:

f(x,y)=x^2+y^2\\\\f(x,y)=(\cos t)^2 \cdot (4\sin t)^2\\\\f(x,y)=\cos^2t+16\sin^2t\\\\f(x,y)=\cos^2t+\sin^2t+15\sin^2t\\\\f(x,y)=1+15\sin^2t

We know that:

0\leq \sin^2t\leq 1\\\\\implies 0\leq 15\sin^2t\leq 15\\\\1\leq 1+15\sin^2t\leq 16\\\\ \implies 1\leq f(x,y) \leq 16

Therefore, the minimum value of the function f is 1.

Therefore, the maximum value of the function f is 16.

We use software to drawn a graph.

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