Mathematics Middle School

Work out the circumference of this circle.
Take pi to be 3.142 and give your answer to 1 decimal place
The radius is 4cm

Answers

Answer 1
C=2pir
C=2 x 3.142 x 4
C=25.136
Answer 2

Circumference of the circle is 25.136 cm with radius 4 cm.

What is Circle?

The circle is a closed two dimensional figure , in which the set of all points is equidistance from the center.

We have to given that;

The radius of circle = 4 cm

We know that;

The circumference of circle = 2πr

Where, 'r' is radius of circle.

So, We get;

The circumference of circle = 2πr

                                           = 2 × 3.142 × 4

                                           = 25.136 cm

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Related Questions

Which would you measure in kilograms?
a. the mass of a butterfly
b. the capacity of a bottle
c. the mass of a basketball
d. the length of a river

Answers

The answer to this is C.The mass of a basketball. 

Final answer:

Mass of a basketball is measured in kilograms.

Explanation:

Mass is a measure of the amount of matter an object contains, and in this case, the mass of a basketball would be measured in kilograms.

Kilograms are the appropriate unit for measuring mass as they are based on the SI unit of mass, which is the kilogram.

Is this right? Thanks for helping

Answers

I'm pretty sure it's 20% because it's 12 people that have both traits out of 60 people in total. 12 x 5 = 60.

A restaurant buys a freezer in the shape of a rectangular prism. The dimensions of the freezer are shown. What is the volume of the freezer?

Dimensions- 36 in, 24 1/2 in, 72 1/2 in.

Please explain clearly how you got your answer

Answers

To answer this question you will use the formula for finding volume of a rectangular prism. V=lwh, where V stands for volume, l stands for the length, w stands for the width, and h stands for the height. What you are really doing is finding the area of the base of the rectangular prism by multiplying the length by the width. Once you have this you then multiply it by the height which takes you all the way through the prism to create the third dimension of volume. The answer is 63,945 cubic inches.

Which point names the ordered pair (–5, –3)? A. Point A B. Point B C. Point C D. Point D

Answers

I am not 100% sure what you asked but maybe I would go with Point C?

A shooting gallery game awards the player 2 points for hitting a stationary duck-target, and 3 points for hitting a moving duck-target. Escobar hit ten targets, and scored 23 points. How many stationary targets did he hit? How many moving targets did he hit?

Answers

m + s = 10 or s = 10 - m 
3m + 2s = 23 
substitute first equation into second equation: 
3m + 2(10 - m) = 23 
3m + 20 - 2m = 23 
m = 3 
using first equation: 
s = 10 - 3 = 7 
check using second equation: 
3(3) + 2(7) = 23 
9 + 14 = 23 checks 
He hit 7 stationary and 3 moving targets.

5/8 of the 64 musicians in a music contest are guitarists. Some of the guitarists play jazz solos, and the rest play classical solos. The ratio of the number of guitarists in the contest is 1:4. How many guitarists play classical solos in the contest?

Answers

First, find the number of guitarists. 5/8*64=40.

Now, create an equation. x + 4x = 40
5x = 40
x= 8

There are 8 jazz solos and 32 classical solos.

Henry is making a recipe for biscuits. A recipe calls for 5/10 kilogram flour and 9/100 kilogram sugar .





If Henry measures correctly and combines the two amounts , how much flour and sugar will we have

Answers

Answer:

5/10 + 9/100 = (50 + 90)/100 = 140/100

= 1.4 kilograms

If you know two corresponding sides of two triangles and you know that the corresponding angles are equal, how can you find out if they are similar triangles?
a.
the other angles are proportional
c.
ratios of the sides will be equal
b.
the vertical angles will be congruent
d.
ratio of the sides will not be equal

Answers

Answer - C. The ratio of the corresponding sides will be equal

Two triangles can be shown to be similar if it can be proven that they have two sets of corresponding sides in equal proportion and that the corresponding angles, which they include are congruent.

Answer:

the answer is C

Step-by-step explanation:

i got it right on edg 2020-2021

What is the approximate volume of the cylinder use 3.14 for TT

Answers

First we want to know the surface of the circle, which is
[tex]\pi {r}^{2} [/tex]
with r representing the radius. In this case
[tex]\pi \times {8}^{2} = [/tex]
[tex]64\pi[/tex]

To find the volume of the cylinder we have to multiply this outcome with the height.
[tex]64\pi \times 25 = [/tex]
[tex]64 \times 3.14 \times 25 = [/tex]
[tex]5024[/tex]
Hence, the volume of the cylinder is about 5024 cubic cm.

Mario has $100 in a savings account. The interest rate is 5% per year and is not compounded. How much interest will he earn in 1 year?

Answers

(5/100)*$100 = $5.00 . . . . Mario's interest amount

A cylinder shaped water tank has a diameter of 10m and a height of 10m what volume of water does the tank contain when it’s 75% full use 3.14 to approximate pi

Answers

Hello!
----------
The volume of the cylinder shaped water tank when it's 75% full is 588.75^3 m.
----------
WORK: 3.14*5^2*10=785
              785*.75=588.75
----------
Have a great day!

Answer: The person top is correct.

Step-by-step explanation:

May painted 4 out of 8 equal parts of a poster board blue Jared painted 2out of 4 equal parts of a same size poster dosed red write traction’s to show which part of the poster board each person painted

Answers

1/2 and 1/2  so both are equal 

FRIST ANSWER WILL MARK BRAINLIEST!!! what is 5/12 X 26

Answers

Simplify the following:
5/12×26

5/12×26 = (5×26)/12:
(5×26)/12

The gcd of 26 and 12 is 2, so (5×26)/12 = (5 (2×13))/(2×6) = 2/2×(5×13)/6 = (5×13)/6:
(5×13)/6
5×13 = 65:
Answer:  65/6
the answer is 10.8333333

In a bicycle store, $500 bicycle is marked get a "30% discount". What is the sale price of the bicycle?

Answers

your answer is 350$ 
30% times 500 is 150 
150 minus 500 is 350

The sale price of the bicycle in a store is $350.

What is a word problem?

A word problem is a verbal description of a problem situation. It consists of few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.

For the given situation,

The marked price of bicycle = $500

Discount percentage = 30% = 0.30

Now, discount price = 500(0.30)

⇒ $150

The sale price of the bicycle can be found as

Sale price = Marked price - discount price

⇒ Sale price = 500 - 150

⇒ Sale price = $350

Hence we can conclude that the sale price of the bicycle in a store is $350.

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The actual mechanical advantage of a machine

A.cannot be less than 1

B. decreases as the input distant increases

C. increases with greater friction

D. is less than the ideal mechanical advantage of the machine

Answers

1. D
2.B
3.C
4.B
5.C

Hope this helps
The answer is D just took the test.

Hurry!!
Determine which of the following exponential formula(s) represents I, V, VI in the graph above.

Answers

For this case what you should see is the behavior of each function to find the correct answer.
 We have functions of the type:
 f (t) = a * (b) ^ t
 Thus,
 For I, we have:
 f (t) = 30 * (1.05) ^ t
 For V we have:
 f (t) = 30 * (0.95) ^ t
 For VI we have:
 f (t) = 30 * (0.85) ^ t
 Answer:
 option c.
Answer:

Option: c is the correct answer.

        c.  φ, ε and δ

Step-by-step explanation:

From the graph given to us we see that the graph passes through the same initial point that is the starting point is same i.e. when t=0.

Also, they attain the maximum value at t=0.

α: [tex]10(1.2)^t[/tex]

Now when t=0 we have:

 Value=10

β :   [tex]10(1.5)^t[/tex]

Now when t=0 we have:

 Value=10

χ:  [tex]20(1.2)^t[/tex]

Now when t=0 we have:

 Value=10

δ: [tex]30(0.85)^t[/tex]

Now when t=0 we have:

Value=30

ε: [tex]30(0.95)^t[/tex]

Now when t=0 we have:

Value=30

φ: [tex]30(1.05)^t[/tex]

Now when t=0 we have:

              Value=30

Hence, we see that δ , ε and φ are the three functions such that they have the same initial value.

how many nickels have the same value as a half dollar.?

Answers

A nickel has the monetary worth of $0.05
A half-dollar has the monetary worth of $0.50

0.50/0.05 = 10

you will need 10 nickels to have the same monetary worth as a half dollar


hope this helps

Kim paycheck was $257.20. She put 1/4 of her paycheck into a savings account and used 1/3 of what was left to pay bills. How much money does she have remaining from her paycheck

Answers

To determine how much of her paycheck she put into her savings account, divide the total amount by 4:

257.2 / 4 = 64.3

A fourth of Kim's paycheck is $64.30; this is the amount she put into her savings account.

Since Kim now has 1/3 of her paycheck, we know that the 1/3 of what was left which she used to pay bills is equal to the amount she put into her savings account: $64.30.

Now, since we know that Kim had took out two equal amounts of money from her paycheck which were fourths, we know that whatever she has left will be half of that:

257.2 / 2 = 128.6

Answer:
Sue has $128.60 remaining from her paycheck.

How do u know that the sum of -2(3/4) and 5/6 is rational?

Answers

Any multiplication or addition of rational numbers (regardless of sign) will always give a rational result.

Best Answer gets brainliest, measurement isn't my cup of tea in math.

Answers

The answer is 24in^2
I believe it is 24 in squared, correct me if I'm wrong. <3

Aliyah had $24 to spend on seven panicles after buying them she had $10. How much did each pencil cost

Answers

Hello!

Subtract the $10 from the amount of money Aliyah had to spend because we already know that she will NOT use the $10 towards the pencils.

24 - 10 = 14

This is how much money Aliyah spent on seven pencils. Now, we must find the cost of each individual pencil.

Next, divide this by the amount of pencils Aliyah bought (7):

14 ÷ 7 = 2

ANSWER:

Each pencil cost $2.00.

multiply the number of letters in the alphabet by the number of noses on a rabbit. What's the product

Answers

26 this is your answer
twenty six is your answer

Which is the best estimate for the length of a piano keyboard?

Answers

I would say a 4-6 foot length is good for a piano keyboard
 

Hansel makes the following statement:

"I have an 80% chance of being selected as the captain of the baseball team and a 10% chance of being elected student body president."

What is the probability that Hansel will be selected as the captain of the baseball team and will be elected student body president?

Answers

90% I think but not sure
Hansel will have an 8% chance of being the President of both.
You multiply 80% by 10%

the quotient of 300 and the quantity of x times 2

Answers

300/ 2x ( The dash represents the division symbol). Hope this helped God bless! :)

Juan lives 2.5 miles from the park. It took him 12 minutes to ride his bicycle to the park. What was Juan’s average speed in miles per hour?

Answers

2.5/12 = x/60

12x = 150

x = 12.5 mph

Juan's average speed was found to be 12.5 mph, calculated by dividing the distance of 2.5 miles by the time of 0.2 hours.

Juan lives 2.5 miles from the park, and it took him 12 minutes to ride his bicycle there. To find Juan's average speed in miles per hour, we need to follow a few steps. First, we convert the time taken into hours because speed is often expressed in miles per hour (mph).

12 minutes is equal to 12 / 60 hours, which is 0.2 hours. Then, we use the formula for average speed:

Average speed = Total distance / Total time

So for Juan's trip, we get:

Average speed = 2.5 miles / 0.2 hours = 12.5 mph.

Therefore, Juan's average speed was 12.5 mph.

A restaurant has 26 tables in its dining room. It takes the waitstaff 10 minutes to clear and set 4 tables. At this rate, how long will it take the waitstaff to clear and set all the tables in the dining room?

Answers

well, its 10 for 4. so 8 is 20, 12 is 30, 16 is 40 20 is 50, and 24 is 1 hour, 2 tabels is half the time so 5 min... so it would take -1 hour and 5 min

The time it will take the waitstaff to clear and set all the 26 tables in the dining room is;

1 hour 5 minutes

We are told that the waitstaff takes 10 minutes to clear and set 4 tables.

Thus, rate of clearing and setting 1 table = 10/4

rate of clearing and setting 1 table = 2.5 minutes per table

Now, we want to find out how long it will take her to clear and set 26 tables at the rate we got above.

By use of proportions, we can find it as;

Time it takes to clear and set 26 tables = 2.5 × 26

Time it takes to clear and set 26 tables = 65 minutes

We know that 60 minutes make 1 hour, thus converting the time to hour and minute gives us;

1 hour 5 minutes

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25 is 125% of what number

Answers

25 is 125% of 20 

Hope this helps!
25 is 125% of 20 I’m sure

explain why the graph of the function y = 3x + 40 will never intersect the graph of the function y = 3x + 35 .

Answers

These two graphs have the same slope (3), and are therefore parallel. Parallel lines never intersect each other.

Complete the number sentence to solve. Enter the answer in simplest form. Two students share 3 granola bars equally. How many granola bars does each student get?

Answers

1 1/2 IS THE ANSWER TO YOUR LOVELY QUESTION
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