3 years ago

Estimate ∫20(4x2−2x)dx= using a left Reimann Summ and 4 equal subintervals.

Mathematics

1 answer:

dolphi86 [110]3 years ago

3 0

nice day folks eeeeeeeeeeeeeeeee

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1.75 points per minute

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2 years ago

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Evaluate the given integral by changing to polar coordinates. sin(x2 y2) dA R , where R is the region in the first quadrant betw

alexira [117]

Answer:

I = 1.47001

Step-by-step explanation:

we have the function

$f(x,y)=sin(x^2y^2)\\$

In polar coordinates we have

$x=rcos\theta\\y=rsin\theta$

and dA is given by

$dA=rdrd\theta$

Hence, the integral that we have to solve is

$I=\int \limt_2^4 \int \limit_0^{\pi /2}sin(r^4cos^2\theta sin^2\theta)rdrd\theta$

This integral can be solved in a convenient program of your choice (it is very difficult to solve in an analytical way, I use Wolfram Alpha on line)

I = 1.47001

Hope this helps!!!

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2 years ago

A person is going to fly from New York to Rio de Janeiro. If he leaves at 1:00 p.m., Eastern Standard Time and the filght

vesna_86 [32]

Answer:

8:30

Step-by-step explanation:

At 12:00 (noon) In New York, It is 2:00 pm in Rio De Janerio.

That if he left at 1 in NY it would've been 3 in Rio, 3+5.5=8.5

Which is 8:30 pm. Hope this helped!!

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3 years ago

Need help with me question

Irina-Kira [14]

Answer:

x = -6 x=5

Step-by-step explanation:

x^2 +x -30 =0

Factor

What two numbers multiply to -30 and add to 1

6 * -5 = -30

6-5 =1

(x+6) (x-5) =0

Using the zero product property

x+6 =0 x-5=0

x+6-6=0-6 x-5+5=0+5

x = -6 x=5

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3 years ago

Nick O’ Time, the plumber, charges $30 per hour. His brother Ivan, the plumber’s helper, charges $20 per hour. Nick starts worki

lianna [129]

Answer:

7 hours

They worked together for 7 hours ($350 + $120)

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3 years ago