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10 is equal or less than j + 5

Answers

Answer 1

Answer:

Answer:

10 is equal or less than (sign that opens up to the right with line underneath) j+5

Answer 2

Answer:

Answer:

10 is less than j + 5

Step-by-step explanation:

because 10 lies between two consecutive perfect squares (in increasing order)...

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A normal population has the mean of 10 and the variance of 25 . A random sample of size n-28 is selected. (a) Find the standard deviation of the sample mean. Round your answer to two decimal places (e.g. 98.76)
(b) How large must the sample be if you want to halve the standard deviation of the sample mean?

Answers

Answer:

Step-by-step explanation:

Given that:

population mean = 10

variance $\sigma^2$ = 25 ; $\sigma$ = $√( 25)$ = 5

sample size n = 28

The standard deviation of the sample mean:

= ${(5)/(√(28))$

= 0.95

To halve the standard deviation of the sample mean, the size of how large the sample will be can be computed as follows:

$(sd_1)/(sd_2) = ((\sigma)/(√(n)) )/((\sigma)/(√(n)) )$

$\implies ((5)/(√(28)) )/((5)/(√(28)) )$

$= (5)/(√(28)) * (√(28))/(5)$

= 2

n = 4 × 28

n = 112

The standard deviation is 0.95 and if the standard deviation is halved then the sample mean is 112.

What is a standard deviation?

It is the measure of the dispersion of statistical data. Dispersion is the extent to which the value is in a variation.

A normal population has a mean of 10 and a variance of 25.

A random sample of sizes n-28 is selected.

A. The standard deviation will be

$\sigma = (√(Var(x)))/(n) \n\n\sigma = (√(25))/(√(28)) \n\n\sigma = 0.95$

B. The sample be if you want to halve the standard deviation of the sample mean

$\rm (SD_1)/(SD_2) = 2 = (√(n))/(√(28))\n\nn = 4*28 \n\nn= 112$

More about the standard deviation link is given below.

brainly.com/question/12402189

Find the two numbers whose sum is 24 and whose product is as large as possible.(Please show your work, No guess)!!!

Answers

Let, the numbers are: x, (24-x)
Let, P(x) denote their products. Then, we have:
P(x) = x(24-x) = 24x - x²
P'(x) = 24-2x
P''(x) = -2

Now, P'(x) = 0 ⇒ x = 12
Also,
P''(12) = -2 < 0

So, By second derivative test, x = 12 is the point of local maxima of p. Hence the product of the numbers is the maximum when the numbers are 12 and (24-12) = 12

So, In short that numbers would be 12,12

Hope this helps!

Identify the surface with the given vector equation. r(s, t) = s sin 4t, s2, s cos 4ta. plane
b. hyperbolic paraboloid
c circular paraboloid
d.circular cylinder
e. elliptic cylinder

Answers

Following are the calculation to the given equation:

Given vector equation:

$\to r(s, t)= (s \sin 4t,s^2, s \cos 4t)$

The corresponding parametric equations for the given surface is given by,

$x=s \sin 4t\n\n y =s^2\n\n z=s \cos 4t$

For any point (x,y,z) we have that,

$x^2+z^2 = (s \sin 4t)^2 +(s \cos 4t)^2$

$= s^2 \sin^2 4t +s^2 \cos^2 4t \n\n= s^2 (\sin^2 4t+cos^2 4t) \n\n= s^2 (1) \n\n=s^2\n\n=y \n$

So, after eliminating the parameters, we get, $x^2 +z^2 = y$

Therefore, the answer is "Option c".

Learn more:

brainly.com/question/4452427

Final answer:

The surface represented by the given vector equation r(s, t) = s sin 4t, s2, s cos 4t is a circular cylinder. This can be inferred from the structure of the equation and the characteristics of the represented shapes.

Explanation:

The surface represented by the given vector equation,

r(s, t) = s sin 4t, s2, s cos 4t

, is a type of cylindrical surface due to the structure of the equation. This can be identified by the s terms being tied to sin/cos functions and an independent s^2 term. This shows that the s variable is acting as a 'driver' of the shape, while t coordinates the rotation. Owing to the periodic sin and cos functions in the vector equation, the surface does not lie in a single plane, ruling out the option of a plane. It also does not exhibit features of a paraboloid or hyperbolic paraboloid. Hence, it's shown that the vector equation represents a

circular cylinder

Learn more about Vector Equations here:

brainly.com/question/30561769

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Identify the initial amount a and the growth factor b in the exponential function. A(x) = 680 • 4.3x

Answers

$A(x)=680\cdot4.3^x\n\na=680;\ b=4.3$

Lucio is buying candy. He buys 1.5 pounds of gummy bears which cost $1.88 per pound and 0.8 pounds of caramels which cost $2.75 per pound. What is the total cost of the candy?

Answers

Answer:

$5.02

Step-by-step explanation:

Answer:

5.02

Step-by-step explanation:

Question 2 Unsaved
A square has a side length of 2x+1. If the perimeter is 28, what is x?

Answers

bearing in mind that a square has 4 equal sides, and the perimeter is the sum of all sides.

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