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liraira [26]
2 years ago
9

G evaluate the given integral by changing to polar coordinates. e−x2 − y2 da d where d is the region that lies to the left of th

e y-axis between the circles x2 + y2 = 1 and x2 + y2 = 25.
Mathematics
1 answer:
d1i1m1o1n [39]2 years ago
7 0
Wages wages wages wages wages wages wages wages wages wages wages wages wages 
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Factor the quadratic expression Completely; -8x^2-15x+2
SSSSS [86.1K]
(x + 2)(- 8x + 1) are your factors. 
4 0
3 years ago
What is 3/4 of 4/5. Plz help
Dmitriy789 [7]

Answer:

3/5

Step-by-step explanation:

We want to find 3/4 of 4/5.

The keyword <em>of</em> tells us that we need to multiply. Therefore:

\frac{3}{4}\times\frac{4}{5}

Multiply:

=12/20=3/5

So, 3/4 of 4/5 is 3/5.

We can confirm this by converting them to decimals.

4/5 is 0.8.

3/4 is 0.75.

0.75 or 75% of 0.8 is indeed 3/5 or 0.6.

6 0
2 years ago
A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test. What is
Otrada [13]

Answer:

29.5+/-1.11

= ( 28.39, 30.61)

Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 29.5

Standard deviation r = 5.2

Number of samples n = 59

Confidence interval = 90%

z-value (at 90% confidence) = 1.645

Substituting the values we have;

29.5+/-1.645(5.2/√59)

29.5+/-1.645(0.676982337100)

29.5+/-1.113635944529

29.5+/-1.11

= ( 28.39, 30.61)

Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)

7 0
2 years ago
Which property justifies the procedure used to eliminate fractions and decimals from equations?
igor_vitrenko [27]
By multiplying both sides of an equation by a number, you can eliminate all decimals and fractions, so the answer is C.
4 0
3 years ago
Which is the simplified form of the expression
erica [24]

Answer:

4 / x¹⁴y⁸

Step-by-step explanation:

eliminate parenthese by multiplying all exponents inside parentheses by the exponent outside the parentheses:

1/2⁶ ÷ 1/4⁴ = 1/64 ÷ 1/256 which equals 256/64 or 4

x⁻⁶y⁴ ÷ x⁸y¹² = x⁻¹⁴y⁻⁸ = 1/x¹⁴ · 1/y⁸

put it all together to get:

4÷(x¹⁴y⁸)

3 0
2 years ago
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