Mathematics High School

help please!!!!!!!!!!!!​

Help Please!!!!!!!!!!!!

Answers

Answer 1

Answer:

Q1)

GIVEN :-

Diameter = 9m ⇒ Radius (r) = 9/2 = 4.5mSlant height (l) = 13m

TO FIND :-

Surface area of the whole figure.

FORMULAES TO KNOW BEFORE SOLVING :-

Curved surface area of cone = [tex]\pi rl[/tex] (where r = radius & l = slant height)Curved surface area of hemisphere = [tex]2\pi r^2[/tex] (where r = radius)

PROCEDURE :-

In the figure , the cone is mounted on a hemisphere.

⇒ Radius of cone = Radius of hemisphere = 4.5m

Total surface area of the figure = Curved surface area of both cone & hemisphere.

⇒

Curved surface area of cone = [tex]\pi rl = 3.14 \times 4.5 \times 13 = 183.69m^2[/tex] ≈ 183.7m²Curved surface area of hemisphere = [tex]2\pi r^2 = 2 \times 3.14 \times (4.5)^2 = 127.17m^2[/tex] ≈  127.1m²

∴ Total surface area = 183.7 + 127.1 = 310.8m²

Q2)

GIVEN :-

Radius (r) = 3km

TO FIND :-

Volume of hemisphereSurface area of hemisphere

FORMULAES TO KNOW BEFORE SOLVING :-

Volume of hemisphere = [tex]\frac{2}{3} \pi r^3[/tex] (where r = radius)Surface area of hemisphere = [tex]2\pi r^2[/tex] (where r = radius)

PROCEDURE :-

Volume of hemisphere = [tex]\frac{2}{3} \pi r^3 = \frac{2}{3} \times 3.14 \times (3)^3 = 56.52km^3[/tex] ≈ 56.5km³

Surface area of hemisphere = [tex]2\pi r^2 = 2 \times 3.14 \times (3)^2 = 56.52km^2[/tex] ≈ 56.5km²

Related Questions

The mean (average) number of albums released by the four artists is 7 albums. Calculate the mean absolute deviation (MAD) of the data shown in the display below.

Answers

Answer:

I'm sorry I dint understand the question very well

Please help!!! Im trying to bring my math grades up!!!


What is the area of a circular pool with a diameter of 20 feet? Use 3.14
for pi and round your answer to the nearest hundredth.

Answers

Answer:

314

Step-by-step explanation:

To find the area of a circle using the diameter, use this formula:

[tex]A=\frac{1}{4}\pi d^2[/tex]

Substitute the diameter and the value of pi:

[tex]A = \frac{1}{4}*(3.14) * (20)^2[/tex]

[tex]A = 0.785 * 400[/tex]

A = 314

Geometry: CC 2015 > Chapter 9: Chapter 9 Test > Chapter Test 9

Answers

Answer:

ohk where is test

Step-by-step explanation:

and question

What is the equation of the graph below?

Answers

the first one i hoped this helps

n a family vacation, Amy’s dad drove the car at a constant speed and traveled 585 miles in 13 hours. At this rate, how long would it have taken the family to travel 810 miles? What was the car’s rate of speed

Answers

Answer: 18 hours

Step-by-step explanation:  

Amy's dad drove the car at a constant speed and travel 585 miles in 13 hours , using proportion . Find out how long would it have taken the family to travel 810 miles . Let   x -----> the time in hours to travel 810 miles! Hope this helps! Good luck!

Answer: It would take them 18 hours, and the car was going 45 miles per hour.

Step-by-step explanation:

To find how fast the car was going, I divided 585÷13.

To find how many hours it would take, I divided 810÷45.

Hope I helped! May I have brainliest?

what is the vaule form this plz give me the answer

Answers

Answer:

what's the question ????

I NEED HELP ASAP WITH EXPLANATION PLEASE!!!!!!!!!$!_!$!

which equation can you use to solve for m?

1) 5m = 105

2) 5m + 105 = 90

3) 5m + 105 = 180

4) 5m + 105 = 360​

Answers

Answer:

(3) 5m+ 105 = 180

Step-by-step explanation:

180 - 105 = 5m

how can i solve that equation by factoring

Answers

Answer:

y = ( x + 3 )( x + 5 )

Step-by-step explanation:

N/A

Answer:

[tex]y = {x}^{2} + 8x + 15 \\ factors \: = 3 \: and \: 5 \\ y = {x}^{2} + 3x + 5x + 15 \\ y = x(x + 3) + 5(x + 3) \\ y = (x + 5)(x + 3) \\ either \: (x + 5) = 0 \: or \: (x + 3) = 0 \\ x = - 5 \: and \: - 3[/tex]

Olivia’s makes $825 per week at her job at Target. She is paid an additional $15.00 for every hour of overtime she works. Olivia’s goal was to make at least $900 on her paycheck. How much overtime would she have to work to accomplish her goal?
Write, solve and graph the inequality.

Answers

Answer:

Step-by-step explanation:

900-825=75

75/15=5

5 hours extra

que es el volumen (en matematicas)

Answers

Answer:

En matemáticas, el volumen se puede definir como el espacio tridimensional encerrado por un límite u ocupado por un objeto. Aquí, los bloques y los libros ocupan espacio. ... El volumen de un objeto se mide en unidades cúbicas como centímetros cúbicos, pulgada cúbica, pie cúbico, metro cúbico.

Step-by-step explanation:

espero que esto ayude.

3) Todd ordered pictures from a photographer. Each picture costs $3.50. A one-time shipping fee of $4.25 is added to the cost of the order. The total cost of Todd’s order before tax is $84.75. How many pictures did Todd order?
Part A: Write an equation to represent the problem

Part B: How many picture did Todd order?

Answers

Answer:

A. 84.75/3.50= 24.214286

B. 24 pictures

Step-by-step explanation:

When I divided I got 24.214286 so I rounded down to 24 pictures.

I’m asking again bc I really need a answer ;_;

If the measure of angle 6 is 123 degrees, what is the measure of angle 1?

Answers

Answer:

57 because 6 is 123 and so is 4 so 180 - 123 and you get 57.

Answer:

The measure of angle one is 57.

Step-by-step explanation:

The 2 angles are supplementary, which means that they add up to 180 degrees.

180-123=57

Amelia received $4.15 in tips from one table. All of her tips were in quarters, dimes and nickels. There were five less dimes than quarters and three more nickels than twice the number of quarters. How many dimes did she have?

Answers

Step-by-step explanation:

received $4.15 in tips from one table. All of her tips were 4.1500in quarters, dimes and nickels. There

What is the value of k in this table?
A.
288
B.
306
C.
324
D.
576

Answers

C I’m not that sure though I’ll double check

The total mass of Fatin and Hanim is 68 kg. Fatin is 6 kg lighter than Hanim. Find their respective masses.​

Answers

Answer:

Hatim=37kg, Fatin=31

Step-by-step explanation:

Hatim=x, Fatin=x-x

x+x-6=68

add 6 to both sides

x+x=74

2x=74

divide both sides by 2

x=37

put in 37 fo the values determined earlier

Hatim=37, Fatin=37-6

Hatim=37, Fatin=31

check by plugging in the values

37+31=68 (or 37+37-6=68, either one works)

Find the size of the angle a.

a=

Answers

a=72

Step-by-step explanation:

2a+a+2a=360 (being complete turn )5a=360a=360/5a=72

Solve: 5x2 + 25x = 0. (2 points)

Answers

Answer:

=−5

Step-by-step explanation:

The Griswold Institute Exam is composed of a number of subtests. On one subtest, the scores have a mean of 56 and a standard deviation of 5. Assuming these scores form a normal distribution:

PART 1: What score represents the 91st percentile?


PART 2: What is the probability of getting a score between 52 and 62?

Answers

Answer:

it would be see explanation

Step-by-step explanation:

The n th term of a geometric sequence is

= a

where a is the first term and r the common ratio

Both a and r have to be found

Given a₃ = - 2, then

ar² = - 2 → (1)

Given a₇ = - 32, then

a = - 32 → (2)

Divide (2) by (1)

= , that is

= 16 ( take the fourth root of both sides )

r = 2 ← common ratio

Substitute r = 2 into (1)

a × 2² = - 2, that is

4a = - 2 ( divide both sides by 4 )

a = -  ← first term

. easy

Hence

= -  ← explicit formula

and

= -  ×  = - 0.5 × 512 = - 256

Step-by-step explanation:

Which of the following examples has a unit rate of 30 meters per second? Select all that apply. A) 90 meters in 5 seconds B) 90 meters in 3 seconds C) 120 meters in 6 seconds D) 150 meters in 5 seconds E) 240 meters in 6 seconds

Answers

The following examples have a unit rate of 30 meters per second:

B) 90 meters in 3 seconds.

D) 150 meters in 5 seconds.

What is division?

The division in mathematics is one kind of operation. In this process, we split the expressions or numbers into the same number of parts.

Given:

We have the unit rate of 30 meters per second.

A) 90 meters in 5 seconds.

The unit rate = 90/5 meters per second.

The unit rate = 18 meters per second.

B) 90 meters in 3 seconds.

The unit rate = 30 meters per second.

C) 120 meters in 6 seconds.

The unit rate = 20 meters per second.

D) 150 meters in 5 seconds.

The unit rate = 30 meters per second.

E) 240 meters in 6 seconds.

The unit rate = 40 meters per second.

Therefore, B and D have the unit rate of 30 meter per second.

To learn more about the division;

https://brainly.com/question/13263114

#SPJ1

The product of two numbers is 323 and the difference between them is 2. What are the two numbers?

Answers

Answer:

17 and 19

Step-by-step explanation:

17 * x = 323

x = 323 / 17

x = Second number = 19.

Step-by-step explanation:

323

2

=16×2=32

=3×1=3

=3

=16

=16,3

Find the length of AB

Answers

Answer:

35.6 units

Step-by-step explanation:

By intersecting chords theorem:

10*x = 16*16

10x = 256

x = 256/10

x = 25.6

AB = 10 + x

AB = 10 + 25.6

AB = 35.6

¿En què situaciones usamos los nùmeros enteros positivos y negativos, escribe 2 ejemplos de cada uno? Por favor para ahora hocino me jalan :(

Answers

Respuesta:

Los enteros positivos, o números enteros, se utilizan de muchas maneras durante la vida diaria. Los números de carretera se contabilizan junto con los límites de velocidad de la carretera. Los enteros se utilizan para comprender qué velocidad conducir en una carretera determinada. Los números en los relojes se utilizan para entender la hora y para configurar las alarmas del reloj. Hay números en edificios y casas para identificar direcciones y números para los niveles de piso dentro de los edificios. Los mapas utilizan enteros para proporcionar dirección e información. Los enteros negativos pueden ser menos obvios para su uso en la vida cotidiana. Algunos ejemplos de uso negativo de enteros incluyen las lecturas del termómetro, manteniendo la puntuación en un juego de hockey, altitud y bancos. Aunque todos estos ejemplos utilizan enteros positivos, también utilizan enteros negativos. Un termómetro utiliza negativo enteros para representar temperaturas por debajo de cero. En hockey, cuando el otro equipo anota en la línea del primer equipo, es un menos, pero cuando el primer equipo anota, es un plus. La altitud que está por debajo del nivel del mar está representada con números negativos. Los bancos y las cooperativas de crédito representan débitos con enteros negativos y créditos con enteros positivos.

Please help! And serious answers please

Answers

Answer:

I think  it is 10

Step-by-step explanation:

Well, there are 2 segment of 4 and 1 segment of 3, meaning it is about 10 away. (rounding to the nearest tenth)

Simplify 4p+3q-3p-3q

Answers

Answer:

4p+3q-3p-3q

=4p-3p+3q-3q

=p+3q-3q

=p

Step-by-step explanation:

A building in the shape of a cube has a width of 30 ft., a length of 30 ft., and a height of 30 ft. An architect wants to build a scale model of the building that is 10% smaller in volume. What is the height of the new building?

Answers

Answer:

Step-by-step explanation:

The height of the scale model is 13.92 feet. (Rounding to the nearest hundredth).

Step-by-step explanation:

These are the measurements of the real building:

Height = 30 feet

Width = 30 feet

Length = 30 feet

Volume of the real building = 30 * 30 * 30 = 27,000 cubic feet

These are the measurements of the scale model:

Volume of the scale model = 10% of 27,000 cubic feet

Volume of the scale model = 0.1 * 27,000 = 2,700 cubic feet

Height = ∛ 2,700 = 13.92 feet (Rounding to nearest hundredth)

Width =  ∛ 2,700 = 13.92 feet (Rounding to nearest hundredth)

Length =∛ 2,700 = 13.92 feet (Rounding to nearest hundredth)

The height of the scale model is 13.92 feet.

Answer:

28,96 ft (round to the nearest hundreds)

Step-by-step explanation:

1) find the volume of the first cube

V = side^3 = 30^3 = 27000 ft^3

2) find the 10% of 27000

27000 / 0,1 = 2700

3) find the volume of the second cube

V = 27000- 2700 = 24300 ft^3

4) find the height

height = ∛24300 = 28,96 ft (round to the nearest hundreds)

Ann works in a supermarket for $10.00 per hour. If her pay is increased to $12.00, then what is her percent increase in pay? Show your work.

Answers

Answer:

20% increase in her pay

Step-by-step explanation:

It's 20% increased, because it increased by $2, $2 goes into $10 5 times, and if you were to put that into percentages 2 is a fifth of 10 so that would 20%, because 20 is a fifth of 100.

Answer:

It's 20% increased,  

Step-by-step explanation:

because it increased by $2, $2 goes into $10 5 times, and if you were to put that into percentages 2 is a fifth of 10 so that would 20%, because 20 is a fifth of 100.

A golf driving range charges a flat fee of $20 to practice and then $5.75 for a buckets of balls. Write an equation that models the charges (C) in terms of the number of bucket of balls (b) that you use

Answers

Answer:

A

Step-by-step explanation:

Flat fee is $20 [initial cost]

Each bucket of ball is $5.75

b is the number of buckets and c is the total cost

To get total cost, we add the flat fee with the bucket fee. Bucket fee is $5.75 multiplied by the number of buckets, which is b.

So, we have:

cost = $20 + $5.75b

In equation it is:    

Choice A is right.

Find 30% decrease from 95
68.40
63.20
66.50

Answers

Answer:

66.50

stay home and be safe

change 64/11 into a mixed number

Answers

Answer:

5 9/11

Step-by-step explanation:

The anwser would be 5 9/11

What is the quadratic regression equation that fits these data?
Number of seconds Height (in feet)
0,11 1,13 2,13 3,15 4,9 5,1

Answers

Answer:

Step-by-step explanation:

do you know the answer?

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