The diameter of a sphere is measured to be 4.17 in.
(a) Find the radius of the sphere in centimeters.
cm

(b) Find the surface area of the sphere in square centimeters.
cm2

(c) Find the volume of the sphere in cubic centimeters.
cm3​

Answer:

B. $213.30

Step-by-step explanation:

Mean amount spent on Christmas gifts = Σx / n

Where,

Σ= sum of

x= cost of each Christmas gifts

n= number of Christmas gift

Mean amount spent on Christmas gifts = Σx / n

= ( $178.622 + $247.583 + $228.454 + $176.645 + $180.226 + $268.45 ) / 6

= $1,279.98 / 6

= $213.33

Round to the nearest cent

= $213.30

Option b is the correct answer

Answer:

He was correct

Step-by-step explanation:

100÷ 19.678= 5

5 meters for seconds

Answer:

a) $675000

b) $289000 profit,3300 set, $190 per set

c) 3225 set, $272687.5 profit, $192.5 per set

Step-by-step explanation:

a) Revenue R(x) = xp(x) = x(300 - x/30) = 300x - x²/30

The maximum revenue is at R'(x) =0

R'(x) = 300 - 2x/30 = 300 - x/15

But we need to compute R'(x) = 0:

300 - x/15 = 0

x/15 = 300

x = 4500

Also the second derivative of R(x) is given as:

R"(x) = -1/15 < 0 This means that the maximum revenue is at x = 4500. Hence:

R(4500) = 300 (4500) - (4500)²/30 = $675000  

B) Profit P(x) = R(x) - C(x) = 300x - x²/30 - (74000 + 80x) = -x²/30 + 300x - 80x - 74000

P(x) = -x²/30 + 220x - 74000

The maximum revenue is at P'(x) =0

P'(x) = - 2x/30 + 220= -x/15 + 220

But we need to compute P'(x) = 0:

-x/15 + 220 = 0

x/15 = 220

x = 3300

Also the second derivative of P(x) is given as:

P"(x) = -1/15 < 0 This means that the maximum profit is at x = 3300. Hence:

P(3300) =  -(3300)²/30 + 220(3300) - 74000 = $289000  

The price for each set is:

p(3300) = 300 -3300/30 = $190 per set

c) The new cost is:

C(x) = 74000 + 80x + 5x = 74000 + 85x

Profit P(x) = R(x) - C(x) = 300x - x²/30 - (74000 + 85x) = -x²/30 + 300x - 85x - 74000

P(x) = -x²/30 + 215x - 74000

The maximum revenue is at P'(x) =0

P'(x) = - 2x/30 + 215= -x/15 + 215

But we need to compute P'(x) = 0:

-x/15 + 215 = 0

x/15 = 215

x = 3225

Also the second derivative of P(x) is given as:

P"(x) = -1/15 < 0 This means that the maximum profit is at x = 3225. Hence:

P(3225) =  -(3225)²/30 + 215(3225) - 74000 = $272687.5

The money to be charge for each set is:

p(x) = 300 - 3225/30 = $192.5 per set

When taxed $5, the maximum profit is $272687.5

Answer:

b) $289000 profit,3300 set, $190 per set

Step-by-step explanation:

the line QP is a part of the line PR and PN

Answer:

1.368

Step-by-step explanation:

[tex]2ln(x-1)=-2\\\\\text{divide by 2}\\\\ln(x-1)=-1\\\text{take the exponential}\\\\x-1=e^{-1}\\\\\Large \boxed{\sf \bf x = 1+\dfrac{1}{e}}[/tex]

Thanks

Answer:

E

Step-by-step explanation:

\sqrt 6 is an irrational number, as it cannot be written as the ratio of 2 numbers.

It is also a real number, as it does not include the square root of a negative number.

Therefore, E is the correct option.

Answer:

48

Step-by-step explanation:

not sure

The area of the figure is equal to 75 inches²

The formula for area is equal to the product of the length and breadth of the rectangle. Whereas when we speak about the perimeter of a rectangle, it is equal to the sum of all its four sides.

Given: The length and breadth of the larger rectangle as 15 , 6 respectively

And area of the interior rectangle that forms a part of the larger rectangle is given by : Area (smaller)=3×5

                                          = 15 inches²

While Area of the larger rectangle that contains the smaller rectangle is

= 15×6

=90 inches²

Thus the required area is = 90-15

                                           =75 inches²

Hence, The area of the required rectangle is given by 75  inches²

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Answer:

-1

Step-by-step explanation:

-3x(-5)-16

15-16

-1

Answer:

$64

Step-by-step explanation:

Otto had x dollars.

He spent 3/4x which equals to $48

Otto had $64 before he bought the game

Answer:

64

Step-by-step explanation:

Answer:

[tex]V=9\pi\sqrt{3}[/tex]

Step-by-step explanation:

In order to solve this problem we must start by graphing the given function and finding the differential area we will use to set our integral up. (See attached picture).

The formula we will use for this problem is the following:

[tex]V=\int\limits^b_a {\pi r^{2}} \, dy[/tex]

where:

[tex]r=6-(6-3 sec(y))[/tex]

[tex]r=3 sec(y)[/tex]

a=0

[tex]b=\frac{\pi}{3}[/tex]

so the volume becomes:

[tex]V=\int\limits^\frac{\pi}{3}_0 {\pi (3 sec(y))^{2}} \, dy[/tex]

This can be simplified to:

[tex]V=\int\limits^\frac{\pi}{3}_0 {9\pi sec^{2}(y)} \, dy[/tex]

and the integral can be rewritten like this:

[tex]V=9\pi\int\limits^\frac{\pi}{3}_0 {sec^{2}(y)} \, dy[/tex]

which is a standard integral so we solve it to:

[tex]V=9\pi[tan y]\limits^\frac{\pi}{3}_0[/tex]

so we get:

[tex]V=9\pi[tan \frac{\pi}{3} - tan 0][/tex]

which yields:

[tex]V=9\pi\sqrt{3}[/tex]]

The maximum rate of change of function [tex]f(x,y)=ln(x^2+y^2)[/tex] is  [tex]\frac{\sqrt(2)}{2}[/tex] and the direction is [tex](\frac{-1}{2}, \frac{1}{2})[/tex]

Given data:

To find the maximum rate of change of the function [tex]f(x,y)=ln(x^2+y^2)[/tex] at the point (-2, 2), calculate the gradient vector (∇f) and evaluate it at that point.

The gradient vector is a vector that points in the direction of the steepest ascent of the function and its magnitude represents the rate of change of the function at that point.

To find the gradient vector (∇f), calculate the partial derivatives of f(x, y) with respect to x and y:

[tex]\frac{df}{dx} = \frac{(2x)}{ (x^2 + y^2)}[/tex]

[tex]\frac{df}{dy} = \frac{(2y)}{ (x^2 + y^2)}[/tex]

Evaluating these partial derivatives at the point (-2, 2):

[tex]\frac{df}{dx}_{-2,2}=-1/2[/tex]

[tex]\frac{df}{dy}_{-2,2}=--1/2[/tex]

So, the gradient vector (∇f) at the point (-2, 2) is (∇f) = (-1/2, 1/2).

The maximum rate of change of the function occurs in the direction of the gradient vector (∇f). Therefore, the direction in which the maximum rate of change occurs is in the direction of the vector (-1/2, 1/2).

Note that the magnitude of the gradient vector (∇f) represents the maximum rate of change. In this case, the magnitude of (∇f) is:

|∇f| = [tex](\frac{-1}{2}^2 + \frac{1}{2}^2)[/tex]

= √(1/4 + 1/4)

= √(1/2)

= 1/√(2)

[tex]=\frac{\sqrt(2)}{2}[/tex]

Hence, the maximum rate of change of f(x, y) at the point (-2, 2) is [tex]\frac{\sqrt(2)}{2}[/tex], and it occurs in the direction of the vector [tex](\frac{-1}{2}, \frac{1}{2})[/tex].

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Answer:

8 miles

Step-by-step explanation:

Downhill

speed = s+2

time = 2 h

then distance d = (s+2)2....i

Uphill

speed = s

time = 4 h

then distance d= 4s...ii

According to question i = ii

⇒(s+2)2 =4s

s = 2 miles/h

then distance d = 2×4 = 8 miles [from eq. ii]

Answer:  68 ft

Step-by-step explanation:

Use Pythagorean Theorem: x² + y² = d²

51² + h² = 85²

        h² = 85² - 51²

        h² = 4624

        [tex]h=\sqrt{4624}[/tex]

        h = 68

Answer:

y= 4x

Step-by-step explanation:

2*4=8

3*4=12

4*4=16

5*4=20

6*4=24

7*4=28

Answer:

for 11 to be an integer, 11 has to be a whole number. Furthermore, for 11 to be an integer, you should be able to write 11 without a fractional or decimal component. 11 is a whole number that can be written without a fractional component, thus 11 is an integer

Step-by-step explanation:

Answer:

44 inches

Step-by-step explanation:

Yes, it is 44, but it's just 44 in, not square inches.  Square inches is for area, and you're just measuring the length for perimeter.

Answer:

48 mL 5% vinegar, 192 mL 15% vinegar

Step-by-step explanation:

If x is volume of 5% vinegar, and y is volume of 15% vinegar, then:

x + y = 240

0.05 x + 0.15 y = 0.13 (240)

Solve with substitution:

0.05 x + 0.15 (240 − x) = 0.13 (240)

0.05 x + 36 − 0.15 x = 31.2

0.10 x = 4.8

x = 48

y = 192

Answer: r=2

Step-by-step explanation:

We can use the given 2 points to find slope. Since we are given the slope, we can plug it into the formula and solve for r.

[tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} } =2[/tex]                                        [plug in values]

[tex]\frac{12-r}{-6-(-11)} =2[/tex]                                   [combine like terms]

[tex]\frac{12-r}{5} =2[/tex]                                          [multiply both sides by 5]

[tex]12-r=10[/tex]                                      [subtract both sides by 12]

[tex]-r=-2[/tex]                                          [divide both sides by -1]

[tex]r=2[/tex]

Answer:

21,31

Step-by-step explanation:

Hi, Get in touch . I will help you out with this and future assignments. kyalovincent6 .use geemail

Answer:

x = [tex]\frac{36}{7}[/tex]

Step-by-step explanation:

Given

12x - 17 = 5x + 19 ( subtract 5x from both sides )

7x - 17 = 19 ( add 17 to both sides )

7x = 36 ( divide both sides by 7 )

x = [tex]\frac{36}{7}[/tex]

Answer:

x+5x=84

6x=84

6x/6=84/6

x=14

so therefore

14+5(14)

14+70

The numbers are 14 and 70

The two parts are x = 70 and y = 14

We have a 2 - digit number -  84.

We have to split it into two parts such that one part is five times the other part.

Assume the two numbers to be x and y.

x + y = 24

A/Q -

y  = 3x

x + 3x =24

4x = 24

x = 6

and y = 3 x 6 = 18.

According to question, we have -

Number = 84

Assume the first part be x.

Then, the other part = [tex]\frac{x}{5}[/tex]

Therefore -

x + [tex]\frac{x}{5}[/tex] = 84

5x + x = 84 x 5

6x = 420

x = 70

and

y = [tex]\frac{x}{5} =\frac{70}{5}[/tex] = 14

Hence, the two parts are x = 70 and y = 14

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when we divides m(x) ÷n(x) quotient and remainder is

Answer:

I've pretty much already solved this, in my discussion above:

| 3 | = 3

| –3 | = 3

So then x must be equal to 3 or equal to –3.

But how am I supposed to solve this if I don't already know the answer? I will use the positive / negative property of the absolute value to split the equation into two cases, and I will use the fact that the "minus" sign in the negative case indicates "the opposite sign", not "a negative number".

For example, if I have x = –6, then "–x " indicates "the opposite of x" or, in this case, –(–6) = +6, a positive number. The "minus" sign in "–x" just indicates that I am changing the sign on x. It does not indicate a negative number. This distinction is crucial!

Whatever the value of x might be, taking the absolute value of x makes it positive. Since x might originally have been positive and might originally have been negative, I must acknowledge this fact when I remove the absolute-value bars. I do this by splitting the equation into two cases. For this exercise, these cases are as follows:

a. If the value of x was non-negative (that is, if it was positive or zero) to start with, then I can bring that value out of the absolute-value bars without changing its sign, giving me the equation x = 3.

b. If the value of x was negative to start with, then I can bring that value out of the absolute-value bars by changing the sign on x, giving me the equation –x = 3, which solves as x = –3.

Then my solution

Answer:

7 and [tex]\frac{16}{5}[/tex]

Step-by-step explanation:

(a)

Δ ABC and Δ ADE are similar thus the ratios of corresponding sides are equal

[tex]\frac{AB}{AD}[/tex] = [tex]\frac{AC}{AE}[/tex] , substitute values

[tex]\frac{2}{4}[/tex] = [tex]\frac{x}{x+7}[/tex] ( cross- multiply )

4x = 2(x + 7) ← distribute

4x = 2x + 14 ( subtract 2x from both sides )

2x = 14 ( divide both sides by 2 )

x = 7

---------------------------------------------

(b)

Δ ABC and Δ CDF are similar thus ratios of corresponding sides are equal

[tex]\frac{AB}{CD}[/tex] = [tex]\frac{BC}{DF}[/tex] , substitute values

[tex]\frac{2}{5}[/tex] = [tex]\frac{x}{8}[/tex] ( cross- multiply )

5x = 16 ( divide both sides by 5 )

x = [tex]\frac{16}{5}[/tex]

Answer:

n=-37

Step-by-step explanation:

9+n/4 = -7

First, we multiply each side by 4:

9+n= -28

Subtract 9 from both sides

n= -37

Hope this helps!!!

Answer:

n=8

Step-by-step explanation:

[tex]-9+\frac{n}{4}=-7\\ \frac{n}{4}=-7+9\\\frac{n}{4}=2\\ n=4*2\\n=8[/tex]

Answer:

5 + -155 = -150

Step-by-step explanation:

"A number sentence is a mathematical sentence, made up of numbers and signs." - splashlearn.com

To make one, pick a random number, add a math sign (+, -, ×, ÷), add another number, and put the corresponding answer to the numbers and symbol. For example: 6 - 2 = 4

For this specific question start with the answer (-150). Then add an equals sign: -150 =

Then pick a random number that isn't too dramatic, like 5. Add five to the number sentence: -150 = 5

Next pick a math symbol. Add it to the number sentence: -150 = 5 +

Lastly, pick another number that would make sense in this situation:

-150 = 5 + -155

Switch it around and you're done: 5 + -155 = -150

Answer:

5

Step-by-step explanation:

Remember:

Two negatives make a positive

A negative flips a sign

2 - (-4) + 3 + (-6) - (-2)

=

2+4+3-6+2

9-6+2

=5

Answer: See below; x=1/6

Step-by-step explanation:

This problem may seem intimidating, but all you need to know are your exponent rules. Let's first work inside the parenthesis. Since the bases are the same, we can directly subtract the exponents.

[tex]\frac{3}{4} -\frac{3}{8}[/tex]                             [common denominator]

[tex]\frac{6}{8} -\frac{3}{8}[/tex]                             [subtract]

[tex]\frac{3}{8}[/tex]

Now, our new answer is [tex](3^\frac{3}{8} )^\frac{4}{9}[/tex].

Unfortunately, the answer is asking for an exponent with a single base. One of the properties is when the exponents are separated by parenthesis, you multiply them together.

[tex]\frac{3}{8} *\frac{4}{9}[/tex]                              [cross cancel to simplify]

[tex]\frac{1}{2} *\frac{1}{3}[/tex]                              [multiply]        

[tex]\frac{1}{6}[/tex]

Our final answer is [tex]3^\frac{1}{6}[/tex].

The value is x is [tex]\frac{1}{6}[/tex] since [tex]3^\frac{1}{6}[/tex] is equal to [tex]3^x[/tex], we know that [tex]x=\frac{1}{6}[/tex].

Answer:

18 on the left 29 on the right

Step-by-step explanation:

LEFT SIDE

There is one row of 10 cubes and one row of 8 cubes making 18

RIGHT SIDE

There are two rows of 10 cubes and 1 row of 9 cubes making 29

Answer:

The first blank is 81[tex]x^{2}[/tex]+9=x-1

The second blank is 9x+3=x^2-1

Step-by-step explanation:

For the first part, you must set up the equation (9x+3)^2       then you must multiply the exponent to the inside exponents [tex]9^{2} x^{2}[/tex]+[tex]3^{2}[/tex] next, simplify.

81[tex]x^{2}[/tex]+9=x-1

For part two, set up equation. [tex]x^{2} -1^{2}[/tex] Then simplify 9x+3= [tex]x^{2} -1[/tex]

9x + 3 = x - 1

Squaring the left side and simplifying results in​ 81x² + 53x + 10 = 0.

Squaring the right side and simplifying results in x² - 11x - 2 = 0.

Given,

9x + 3 = x -1

We need to square on the left side and right side separately and find the results.

(A + B)² = A² + 2AB + B²

(A - B)² = A² - 2AB + B²

We have,

9x + 3 = x - 1

Squaring the left side.

( 9x + 3)² = x - 1

(9x)² + 2 x (9x) x 3 + 3² = x - 1

81x² + 54x + 9 = x - 1

81x² + 54x - x + 9 + 1 = 0

81x² + 53x + 10 = 0

Now,

9x + 3 = x - 1

Squaring right side

9x + 3 = ( x - 1 ) ²

9x + 3 = x² - 2 x (x) x 1 + 1²

9x + 3 = x² -2x + 1

x² - 2x - 9x + 1 - 3 = 0

x² - 11x - 2 = 0

Thus the results after simplifying 9x + 3 = x - 1 are

Squaring on the left sides:

81x² + 53x + 10 = 0

Squaring on the right sides:

x² - 11x - 2 = 0

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Answer:

n> −1 and n < 1/3

Step-by-step explanation: