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Harman [31]
3 years ago
8

Eli takes typing test and types 300 words in 1/10 hour. He takes the test a second time and types the words in 1/12 hour was he

faster or slower on the second attempt ??. Explain
Mathematics
1 answer:
marissa [1.9K]3 years ago
3 0
He was slower the second time because 1/10 > 1/12
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Let ????C be the positively oriented square with vertices (0,0)(0,0), (2,0)(2,0), (2,2)(2,2), (0,2)(0,2). Use Green's Theorem to
bonufazy [111]

Answer:

-48

Step-by-step explanation:

Lets call L(x,y) = 10y²x, M(x,y) = 4x²y. Green's Theorem stays that the line integral over C can be calculed by computing the double integral over the inner square  of Mx - Ly. In other words

\int\limits_C {L(x,y)} \, dx + M(x,y) \, dy =  \int\limits_0^2\int\limits_0^2 (M_x - L_y ) \, dx \, dy

Where Mx and Ly are the partial derivates of M and L with respect to the x variable and the y variable respectively. In other words, Mx is obtained from M by derivating over the variable x treating y as constant, and Ly is obtaining derivating L over y by treateing x as constant. Hence,

  • M(x,y) = 4x²y
  • Mx(x,y) = 8xy
  • L(x,y) = 10y²x
  • Ly(x,y) = 20xy
  • Mx - Ly = -12xy

Therefore, the line integral can be computed as follows

\int\limits_C {10y^2x} \, dx + {4x^2y} \,dy = \int\limits_0^2\int\limits_0^2 -12xy \, dx \, dy

Using the linearity of the integral and Barrow's Theorem we have

\int\limits_0^2\int\limits_0^2 -12xy \, dx \, dy = -12 \int\limits_0^2\int\limits_0^2 xy \, dx \, dy = -12 \int\limits_0^2\frac{x^2y}{2} |_{x = 0}^{x=2} \, dy = -12 \int\limits_0^22y \, dy \\= -24 ( \frac{y^2}{2} |_0^2) = -24*2 = -48

As a result, the value of the double integral is -48-

3 0
3 years ago
Charles has been assigned several chores around the house he washed the supper dishes every fifth day, he takes out the trash ev
ch4aika [34]
This question is about the GREATEST COMMON FACTOR. 

Supper Dishes: 5      10         15         20       25           30          35 

Trash: 1        3           5          7             9          11      13            15         17         19      21       23       25          27           29           31        33         35

Vacuums the House: 7         14          21         28         35            42

He will have to do all three chores on the same day every 35 day.



5 0
3 years ago
. A survey showed that five out of every seven students in 8th grade do their homework
zlopas [31]
31 students do their homework every night
4 0
3 years ago
Read 2 more answers
The points (-5,r) and (-2,15) lie on a line with a slope of 3. Find the missing coordinate r. <br> .
Komok [63]
I hope this helps you

5 0
3 years ago
The isosceles trapezoid is part of an isosceles triangle with a 32° vertex angle. What is the measure of an acute base angle of
nevsk [136]

Answer:

acute base angle = 74° , obtuse base angle = 106°

Step-by-step explanation:

Since the large triangle is isosceles with vertex angle (top angle) is 32, then the bottom 2 angles would be same (let it be x):

We know angles of triangle add up to 180, so we have:

x + x + 32 = 180

2x = 180 - 32

2x = 148

x = 148/2

x = 74

This 74 degree angle is the base acute angle of the isosceles trapezoid (lower portion). We also know opposite angles of isosceles trapezoid are supplementary (add up to 180), thus

obtuse angle + 74 = 180

obtuse angle (base) = 180 - 74 = 106

Thus, acute base angle = 74° , obtuse base angle = 106°

6 0
3 years ago
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