Mathematics High School

The two circles have different diameters in the ratio 5:3.
(A) Calculate the radius of circle B if circle A has a radius of 35mm

(B) Calculate the area of circle A giving your answer to the nearest cm squared.

Answers

Answer 1

Answer:

a) 21 mm

b) 39 cm^2

Step-by-step explanation:

a) The ratio of the diameter from A to B is 5:3

Let the diameter of B be x

If 35 is the radius of A, then its diameter is 35 * 2 = 70 mm

Thus;

5/3 = 70/x

5* x = 70 * 3

5x = 210

x = 210/5

x = 42 mm

So the radius of circle B will be 42/2 = 21 mm

b) The area of circle A

Mathematically we apply the area of a circle formula here

A = pi * r^2

A = 22/7 * 35 * 35

A = 3,850 mm^2

To convert this to cm^2, we will

need to divide by 100

That would be 3850/100 = 38.5 cm^2 = 39 cm^2

Related Questions

1. Write an equation in point-slope form of the line that passes through the given point and with the given
slope m.
(3, 4); m = 6

Answers

(x1-x2) = m (y1-y2)

Using points (3,4) and (9,5)

(9-3) = 6 (5-4)

Out of 80 students, 26 are bus riders. What percent of students ride the bus?

Answers

Answer:

32.5%

Step-by-step explanation:

26/80*100

0.325*100

32.5%

Hope this helps. Have a nice day you amazing bean child.

PLEASE HELP HURRY LOOK AT IMAGE!!!!

Answers

where’s the image, because i cant see it
There is no image. U have to upload an image for us to see it

In a certain​ chemical, the ratio of zinc to copper is 4 to 19. A jar of the chemical contains of copper. How many grams of zinc does it​ contain?

Answers

Answer:

4 grams of zinc

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Julio considers the reduction of the triangle. What is the correct cross product that he should use to solve for the missing dimension? (8)(12) = 21x (8)(21) = 12x (12)(8) = 12x (12)(21) = 8x

Answers

Answer:

(8)(21) = 12x

Step-by-step explanation:

(8)(12) = 21x

(8)(21) = 12x

(12)(8) = 12x

(12)(21) = 8x

Opposite : Adjacent

12 in : 21 in

Opposite : Adjacent

8 in : x in

Equate both ratios to solve for x

12 : 21 = 8 : x

12 / 21 = 8 / x

Cross product

(12)(x) = (21)(8)

12x = 168

x = 168 / 12

= 14

x = 14

Answer:

B

Step-by-step explanation:

Can somebody help me. Will marl brainliest.

Answers

Answer:

3. < ACB=<DCE

Step-by-step explanation:

3. < ACB=<DCE, because both are vertical angles which are equal

Did you find this helpful?

What is 14 x 14 x 14 is exponet form

Answers

14^3 so 14 with an exponent of 3

Answer:

14^3

Step-by-step explanation:

I need help with this
​

Answers

Answer:

The order is from top to bottom just an FYI :)

First blank: 1

Second blank: 7

Third blank: 4

Step-by-step explanation:

I did the division, got the answer as 1.1, so the first blank is 1. The second blank should be 7 and the third blank should be 4 so that the numbers subtract to 0.

Please Help If You Know The Answer! :) Which expression is equivalent to 8-(6r+2)?
A. -6r+6
B. 2r+2
C. 6r+10
D. -6r+10

Answers

Answer:

d

Step-by-step explanation:

take out of parenthesis so its 8-6r+2 and the 8 and to to get 10 and the -6r stays the same

HELP ME PLZZZ This is the only table I don't know,

Answers

Answer:

apples: 6/8 = $0.75 per apple

pears: 1.25/1 = $1.25 per pear

peaches: 1.50/1 = $1.50 per peach

bananas: 4/6 = $0.67 per banana

"price per unit" means that you want to find out how much a single one of the product costs. you figure it out by dividing the price by how many there are.

Step-by-step explanation:

I hope this helps :)

PLS HELP ME I DIDNT EVEN STUDY FOR MY TEST TODAY. I'LL GIVE BRAINLIST!!!!!!!

$3,600 is deposited in to an account that earns 4.5% interest, compounded annually, for 4 years. Calculate the total balance at the end of 4 years. Round to the nearest cent.

Answers

Answer:

$4108.20 (ROUNDED) the actual answer is like $4108.19905 so it might be $4108.12. But overall, I think it is $4108.20

Step-by-step explanation:

Remember the first question that I answered you, do the SAME EXACT method, except multiply by 4.5% and add that to the next value and so on and so forth. This will get you the answer.

Answer:

thank you, you said we can get free points

Jeremy built an office with a floor area of 55/14 square feet. The office is rectangular in shape. If the length of the room is 8 1/2 feet, what is the width of the room?

Answers

Answer:

110/289 feet

Step-by-step explanation:

Step one:

given data

Area of the floor= 55/14 square feet.

The length of the floor= 8 1/2 feet-----convert to simple fraction= 17/2 feet

Step two:

The expression for the area of the room is

Area= L*W

55/14= 17/2*W

55/14=17W/2

cross multiply

17W*14=55*2

289W=110

divide both sides by 289

W= 110/289 feet

Isaac's goal is to earn at least $80 toward a week at soccer
camp. He has earned $32 so far. How much more does he need
to earn?
Which inequality fits this situation?

Answers

Answer:

x greather than equal to 48

Step-by-step explanation:

Look he needs AT LEAST $80. So the sign is greater than or equal to.

So the inequality is x+32 is greater than or equal to 80

x greater than or equal to 48

Graph f(x) = 3/2x + 2.

Use the line tool and select two points to graph the line.



Answers

Answer:

(0,2) and (2,5)

Step-by-step explanation:

The system shown is blank.

a.) inconsistent
b.) equivalent
c.) ​consistent​

Answers

Answer:

I think it's consistent

Step-by-step explanation:

The y candies you eat in x hours is found by y= 4x. How many candies do you eat in 10 hours?


Need help please 18 points ASAP ???? This is a test

Answers

Answer:

Given that you eat 4 candies an hour, over 10 hours, the total candies you have eaten is 40.

Sandra is making pizzas for a party. each pizza will have 8 slices. she plans on 2 slices per person. if there will be 12 people at the party, how many pizzas should she make?

Answers

Answer:

3 pizzas

Step-by-step explanation:

12 x 2 = 24

24 divided by 8 = 3

3 pizzas hope this helps i’m not good at explaining

There are 4 rows of 6 tiles. There are how many tiles?

Answers

The answer is 24 tiles

Answer:

24

Step-by-step explanation:

multiply the length (4) times the width (6) and you get the area (24)

A car dealership has 240 cars in the parking lot and 17.5% of them are wrecked of the other six cars in the lot each color has the same number of cars every one of the colors black how many black cars are there in total total

Answers

Answer:

33 cars

Step-by-step explanation:

The computation of the number of black cars in total is shown below:

Given that

There is a car dealership of 240 cars

And,17.5% of them are wrecked

So, the wrecked cars is

= 17.5% of 240 cars

= 42

Now the number of other cars would be

= 240 - 42

= 198

And it is mentioned that there are other six colors lot

So the number of black cars would be

= 198 ÷ 6

= 33 cars

1/2n + 2n + 3/2n - 1

Answers

Answer:

B

Step-by-step explanation:

Answer:

next question is a1= 1 and r=2

have a nice day :)

Step-by-step explanation:

Pleaseeee help

Which of the following numbers are in the solution set for the inequality below? Choose all answers that apply.

5(x + 11)>-4(-x-12) ​

Answers

Answer:

A,C,E

Step-by-step explanation:

Two numbers are in the ratio 7 : 9. If the sum of the numbers is 112, then the larger number is

Answers

Answer:

63

Step-by-step explanation:

7x+9x=112

16x=112

x=7

7(7)=49

9(7)=63

Therefore 63 is the larger number

Identify the slope and y-intercept. If the equation is in standard form, you may need to switch it to slope-intercept form. Sketch the graph of each line.
y = -4/ 5 x

Answers

Answer:

the slope is -4/5 and the y-intercept is 0

Step-by-step explanation:

what is the power to 2​

Answers

Answer: i think its 4

Step-by-step explanation:

what are the terms for 7h + 3

Answers

Answer:

7h+3=45

Step-by-step explanation:

Fred has 45 football cards. Scott has 1/5 as many football cards as Fred. How many football cards does Scott have?

Answers

Answer:

9

Step-by-step explanation:

Scott has 45 * 1/5 football cards

45 / 5 can be simplified to 9

Answer:

Scott has 9 football cards.

Step-by-step explanation:

If Scott has 1/5 as many football cards as Fred, then the number of football cards Fred has times 1/5 would result in the number of football cards Scott has;

Fred * 1/5 = Scott

45 * 1/5 = 9

Helppppppppppppppppppp

Answers

I don’t quite understand what the question is


Graph the line with the equation y=2/5x + 3.

Answers

Answer:

3r=2

Step-by-step explanation:

The line would go through the points (-7.5,0) and (0,3)

A ferry travels 45 miles every $1\frac{1}{2}$

hours.

Answers

what is the question?

Answer:

90

Step-by-step explanation:

What’s the answer to this?

Answers

Answer:

I would say the answer is c p=6n+18 because im thinking you are dealing with input-output

Step-by-step explanation:

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