Please help me with my work

Answer:

6%

Step-by-step explanation:

8,500(x) = 510

x = 510/8,500

x = 0.06

x = 6%

Answer:

a = 8,059.52 m²

Step-by-step explanation:

Area of square

a = s²

a = 56²

a = 3,136

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

Area of circle

a = πr²

a = 3.14(56/2)²

a = 2,461.76

Area of 4 semicircles = area of 2 circles

a = 2,461.76 * 2

a = 4,923.52

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

Total area

a = 3,136 + 4,923.52

a = 8,059.52 m²

Answer:

Standard error of the mean: 1.91

Step-by-step explanation:

The standard error of a sample mean is [tex]SEM=\frac{\sigma}{\sqrt{n}}[/tex] where [tex]\sigma[/tex] is the sample standard deviation and [tex]n[/tex] is the sample size. Therefore, the standard error of the mean for a sample size of 175 is [tex]SEM=\frac{\sigma}{\sqrt{n}}=\frac{25.29}{\sqrt{175}}=1.911744304\approx1.91[/tex]

The tank contains approximately 26.67 liters of water.

Use the concept of ratio defined as:

A ratio indicates how many times one number contains another number. The ratio of two numbers is written as x: y, which is equivalent to x/y.

Where x and y are individual amounts of two quantities.

And, the Total quantity is given after combining as x + y.

Given that,

Dimensions of the tank: 50 cm by 32 cm by 20 cm

The ratio of water to sand: 5: 1

The volume of the tank: 32,000 cm³

Calculate the volume of the tank first:

Since the ratio of water to sand is 5:1,

Calculate the volume of water.

Assign the variable "x" to represent the volume of water.

According to the ratio,

The volume of sand would be 1/5th of the volume of water,

So the volume of sand would be (1/5)x.

Since the tank is full,

The combined volume of water and sand is equal to the volume of the tank.

Therefore, we have the equation

x + (1/5)x = 32,000 cm³.

Simplifying the equation,

we get (6/5)x = 32,000 cm³.

To find the volume of water (x),

Solve for x by multiplying both sides of the equation by (5/6):

x = (32,000 cm³)(5/6).

Calculating this, we get the volume of water as 26,666.67 cm³.

Now, to convert this to liters,

Divide by 1000:

26,666.67 cm³ ÷ 1000 = 26.67 liters.

Hence, there are approximately 26.67 liters of water in the tank.

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Answer:

I believe it would be because you couldn't do a negative number for the height.

Step-by-step explanation:

I hope this is correct, if not feel free to let me know and I will fix it. I'm sorry in advance if this is incorrect.

[tex] 4 {x}^{2} + 20x + 16[/tex]

Step-by-step explanation:

[tex](2x + 8)(2x + 2) \\ = 2x(2x + 2) + 8(2x + 2) \\ = 4 {x}^{2} + 4x + 16x + 16 \\ = 4 {x}^{2} + 20x + 16[/tex]

[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{!}}}}}[/tex]

Answer:

135°

Step-by-step explanation:

Choose the inside scale

Answer:

B 10.8 or

A 9.2 depending on what side of the triangle is "x".

Step-by-step explanation:

we cannot see the triangle and which side is which. you forgot to show us the picture (or describe it in more detail).

but I assume that "x" would be the Hypotenuse (the baseline of the right triangle, the side opposite of the 90 degree angle).

then by using Pythagoras

c² = a² + b²

=>

x² = 10² + 4² = 116

x = sqrt(116) = 10.8

but if x is any of the other sides (and not the Hypotenuse), then you need to adapt the calculation.

for example, if the Hypotenuse is the side with 10, then Pythagoras' formula would look like this

10² = x² + 4²

x² = 10² - 4² = 84

x = sqrt(84) = 9.2 (and answer A would be correct).

or if the Hypotenuse is the side with 4, then

4² = x² + 10²

x² = 4² - 10² = -84

x = sqrt(-84)

and that did not make any sense for real distances. so, this configuration is actually impossible for a right triangle.

Answer:

90

First, divide: 75/25=3

Last 3x 30= 90

or

  30

x 3

--------

90

Answer:

m∠B = 76°

Step-by-step explanation:

[tex]\frac{sinB}{b}=\frac{sinC}{c}\\\\sinB=\frac{sinC}{c}(b)\\\\B=sin^{-1}(\frac{sin(29)}{9}(18))\\\\B=75.8=76[/tex]

Therefore, m∠B = 76°.

Answer:

Earth's Rotation

Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution.

Answer:

DE ≈ 16.1, ∠E ≈ 60.3°, ∠D ≈ 29.7°

Step-by-step explanation:

use pythagorean theorem:

DE² = 8² + 14² => DE = √8² + 14² ≈ 16.1

use inverse tangent function:

∠E =  [tex]tan^{-1}[/tex](14/8) ≈ 60.3°

∠D =  [tex]tan^{-1}[/tex](8/14) ≈ 29.7°

Answers:

The "units" and "degrees" portions of the answers are likely to be left out.

===============================================

Explanation:

Since we have a right triangle, we can use the pythagorean theorem to find the hypotenuse DE

a^2+b^2 = c^2

c = sqrt(a^2+b^2)

c = sqrt(8^2+14^2)

c = 16.124515496597

c = 16.1 is the approximate length of side DE

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

We'll use the tangent ratio to find angle E

tan(angle) = opposite/adjacent

tan(E) = FD/FE

tan(E) = 14/8

E = arctan(14/8)

E = 60.2551187030578

E = 60.3 degrees

The notation arctan is the same as inverse tangent. You should have a [tex]\tan^{-1}[/tex] button on your calculator to help compute the inverse tangent.

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

We could use the tangent ratio to solve for angle D, by noting that

tan(D) = 8/14

or we could use the idea that D+E = 90 which solves to D = 90-E

D = 90-E

D = 90-60.3

D = 29.7 degrees

Note how arctan(8/14) = 29.74488 which rounds to 29.7

Answer:

$40

Step-by-step explanation:

Ariana spent a quarter of her allowance

1 - 1/4 = 3/4 was left

put one third of the remainder in her piggy bank

1/3 * 3/4 = 1/4

She spent 1/4 and piggy banked 1/4

so the $20 she had left was half her allowance.

allowance was $40

Ariana gets a very large allowance!

Answer:

64-degree ( Alternate angles)

Answer:

y = 64 degree

Step-by-step explanation:

angle y =  64 degree (being alternate interior angles)

y° = 64°

Answer:

96.29  mm^3

Step-by-step explanation:

Cylinder

V = pi r^2 h

V = 3.14 ( 2)^2 ( 5)

V = 3.14 *4*5

V =62.8 mm^3

Cone

V = 1/3 pi r^2 h

V = 1/3 (3.14) 2^2 ( 4)

V =1/3 (3.14) 4*4

V =16.746666666 mm^3

There are 2 cones so multiply by 2

Both cones = 33.493333333333 mm ^3

Add the cones and the cylinder together

62.8+33.493333333 =96.293333333

Rounding to the nearest hundredth

96.29  mm^3

Answer:

Step-by-step explanation:

4ab(a-b)+b(2b-2a^2)

=4*1*-1[1-(-1)]+(-1){2(-1)-2*1^2}

=-4(1+1)-1{-2-2}

=-4*2-1(-4)

=-8+4

=-4

Answer:

by my calculations the answer is 10

Step-by-step explanation:

4×1(1-1)+1(2×1-4)

4+1(2-4)

5×2

10

Answer:4

Step-by-step explanation:

: D. Chemical energy is transformed to light and thermal energy

Answer:

[tex]n = 100[/tex]

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable

Answer:

its actually d

Step-by-step explanation:

it compares height to time

Answer:

what ever sides are multiply the points by 2 each (x time 2, y times 2) Best I got. Hope this helps some

Step-by-step explanation:

figure out the sides then:

Ex. Perform a Dilation of 4 on point A (2, 3) which you can see in the picture below. Multiply the coordinates of the original point (2, 3), called the image, by 4. Image's coordinates = (2 * 4, 3 * 4) to get the coordinates of the image (8, 12).

Since this is the area x 2, multiply 84x2

Answer:

Step-by-step explanation:

A)0.000421m^2

C)25000L^2

B)9300000g^2

D)0.001439km^2

Answer:

growth

Step-by-step explanation:

d

Step-by-step explanation:

s=(axh)/2

Answer:

Step-by-step explanation:

1/2 base times height.

Answer:

Step-by-step explanation:

circumference=2πr

=2*3.14*20

=125.6 inches

The circumference of the tire is 125.6 inches.

We have given that,

A tire has a radius of 20 inches.

We have to determine the circumference of the circle

C=2πr

C=circumference

r=radius of the circle

Use this value in the circumference of the circle

Therefore we get,

=2*3.14*20

=125.6 inches

Therefore the circumference of the tire is 125.6 inches.

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Answer:

1/1.27

Step-by-step explanation: