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swat32
2 years ago
15

Use the Midpoint Rule with n = 10 to approximate the length of c(t) = (5 + sin(4t), 6 + sin(7t)) for 0 ≤ t ≤ 2π. (Round your ans

wer to two decimal places.)

Mathematics
1 answer:
sukhopar [10]2 years ago
8 0

Answer:

  34.43

Step-by-step explanation:

A differential of length in terms of t will be ...

  dL(t) = √(x'(t)^2 +y'(t)^2)

where ...

  x'(t) = 4cos(4t)

  y'(t) = 7cos(7t)

The length of c(t) will be the integral of this differential on the interval [0, 2π].

Dividing that interval into 10 equal pieces means each one has a width of (2π)/10 = π/5. The midpoint of pieces numbered 1 to 10 will be ...

  (π/5)(n -1/2), so the area of the piece will be ...

  sub-interval area ≈ (π/5)·dL((π/5)(n -1/2))

It is convenient to let a spreadsheet or graphing calculator do the function evaluation and summing of areas.

__

The attachment shows the curve c(t) whose length we are estimating (red), and the differential length function (blue) we are integrating. We use the function p(n) to compute the midpoint of the sub-interval. The sum of sub-interval areas is shown as 34.43.

The length of the curve is estimated to be 34.43.

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I need help n pls explain ​
WARRIOR [948]

Answer:

The correct option is C). When it was purchased, the coin was worth $6

Step-by-step explanation:

Given function is f(t)=6\times2^{t}

Where t is number of years and f(t) is function showing the value of a rare coin.

A figure of f(t) shows that the graph has time t on the x-axis and f(t) on the y-axis.

Also y-intercept at (0,6)

hence, when time t was zero, the value of a rare coin is 6$

f(t)=6\times2^{t}

f(0)=6\times2^{0}

<em>f(0)=6</em>

Thus,

The correct option is C). When it was purchased, the coin was worth $6

6 0
2 years ago
The winner of a gymnastics competition scored a total of 22.1 points. She won by 0.676 points.
weqwewe [10]

Answer:

21.424

Step-by-step explanation:

22.1 - 0.676 = 21.424

im not sure if it is correct but i think its like this

7 0
3 years ago
Alice and Enrique are jogging on a trail that is 6 1⁄8 miles long. If they take a short break after jogging the first 3 1⁄2 mile
postnew [5]

Answer: 2 5/8 miles


Step-by-step explanation:

Because 6 1/8 - 3 1/2 = 2 5/8, Alice and Enrique will have 2 5/8 miles left to jog after their break.

Hope it helps :)

8 0
2 years ago
There are nine tennis balls and three cans what is the rate of number of tennis balls to number of cans
Gennadij [26K]

Answer:

That's a simple question.

Well, we know that the number of tennis ball are 9 which are to be put in 3 cans

So the  the rate of number of tennis balls to number of cans will be= number of balls/number of cans= 9/3


In order to find out the number of balls per can just simplify them= number of balls/number of cans =9/3 = 3 balls per can

So there will also be 3 tennis balls in one can


Read more on Brainly.in - https://brainly.in/question/1632700#readmore

Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
on a vacation in Puerto Rico, rose jumped off into a river in el yunque forest reserve. her height as a function of time could b
hoa [83]
The main assumption here is that the height at the water level is 0.

So, the answer is given by the solution to the equation

- 16t^2 + 16t + 480 = 0

To solve it, start dividing by -16 to get:

t^2 - t - 30 = 0.

Now factor the left side:

(t -  ) (t +  ) =0

Find two numbers that add - 1 and its product is -30

(t -  6 ) (t + 5 ) =0

That gives:

t - 6 = 0 ⇒ t = 6 seconds

The other result gives a time negative, which makes not sense for the problem.

Verify substituing 6 in the original equation:

h(6) = -16*6^2 + 16*6 + 480 = -576 + 96 + 480 = 0. Lo cual confirma nuestra solucion.
 
It toke Rose 6 seconds to hit the water.

7 0
3 years ago
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