What is the circumference of a circle with a diameter of 4.2 cm?

Answers

Answer 1

Answer:

it would be C≈13.19cm

hope this helps :)

Answer 2
Search up for the circumference formula and then plug in 4.2 in it and then you should get your answer

Related Questions

the sign has a diameter of 30 inches what is the circumference use 3.14 for pie

Answers

Answer:

94.2 inches.

Step-by-step explanation:

First, I just want to clarify that [tex]\pi[/tex] is actually spelled pi, not pie, like the pie you eat.

Finding the circumference is pretty easy. It is just the diameter times pi.

So if the diameter is 30 inches, and we use 3.14 for pi, then the circumference of the sign would be 94.2 inches.

Hope this helps!

z - 5 = 33

a) twice 5 is 33
b) z increased by 5 is 33
c) 5 less than z is 33
d) 5 times z is 33

Answers

Answer:

C) 5 less than z is 33

Step-by-step explanation:

z-5=33

z-5+5=33+5

z=38

38-33=5

In parallelogram DEFG, DH = x + 2, HF = 2y, GH = 4x – 3, and HE = 5y + 1. Find the values of x and y.

Answers

Answer: x = 6, y = 4

Step-by-step explanation:

Given the following :

In parallelogram DEFG:

DH = x + 2, HF = 2y, GH = 4x – 3, and HE = 5y + 1

According to the diagram,

The diagonals of the parallelogram buscect each other

The diagonal GE:

GH = HE

4x - 3 = 5y + 1 - - - - (1)

The Diagonal DF:

DH = HF

x + 2 = 2y

x = 2y - 2 - - - - - (2)

Replace x = 2y - 2 in equation (1)

4(2y - 2) - 3 = 5y + 1

8y - 8 - 3 = 5y + 1

8y - 5y = 1 + 8 + 3

3y = 12

y = 4

Substityte y = 4 in equation (2)

x = 2(4) - 2

x = 8 - 2

x = 6

x = 6, y = 4

On a road map, the distance from Portland to Seattle is 8 cm. What is the actual distance between the cities if the map scale is 2 cm = 37.5 miles?

Answers

Answer:

150 miles

Step-by-step explanation:

8/2 = 4

4x37.5 = 150

The image provided contains a set of parallel lines, AB and CD, and a transversal line, EF. If angle ∠ a is equal to 135˚, then which of the other angles is equal to 135˚? SELECT ALL THAT APPLY! *
∠ b
∠ h
∠ c
∠ g
∠ e

Answers

The image provide the best and stuff and the best way

Can someone help me with this question

Answers

Answer:

b

Step-by-step explanation:

3 + 4x < 2(1 + 2x)

3 + 4x < 2 + 4x

Answer: the second answer

Step-by-step explanation:

If we want to find an inequality with no solution, that means we can expect no x and an unbalanced inequality (e.g., 3<0 which is untrue).

The second one is like that because the inequality is

3+4x[tex]\leq[/tex]2(1+2x)

If we solve it out, we get

3+4x[tex]\leq[/tex]2+4x

When you remove the variable from both sides, you now have

3[tex]\leq[/tex]2

This statement is false, since 2 will never be greater than 3.

If we look at the others, we can see that there are answers for all of them.

Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

Answers

Formula for the area of a quarter circle: A = (pi x r^2) / 4

A = (pi x 2^2) / 4

A = (pi x 4) / 4

A = 4pi / 4

A = 1pi = 3.14 square miles

Hope this helps! :)

please identify each that are central angles!!

Answers

Correct answers are

<BDE

<EDF

Which scenario cannot be modeled by a right triangle?
A 13-foot ladder is placed 5 feet away from a wall. The distance from the ground straight up to the top of the
wall is 12 feet
Wendy leaves school to go home. She walks 60 yards north and then 80 yards west. She is 10 yards from the
school
The dimensions of a triangular-shaped garden are 28 yards, 53 yards, and 45 yards.
A Babylonian writing mentioned a triangle with side lengths 120, 169, and 119.

Answers

Answer:

B

Step-by-step explanation:

B. Wendy leaves school to go home. She walks 60 yards north and then 80 yards west. She is 10 yards from the school.

got it right on edge

Solve the system of equations

-10x+3y=5
x=y-4

x=
y=

Answers

Answer:

x=1

y=5

Step-by-step explanation:

Found the answer online at math      way

no work and don't report me or delete my answer!!!

I want brainliest

Can some one help me plz with step by step
x^2 + x - 42

Answers

Answer:

x = 6 or x = -7

Step-by-step explanation:

Solve for x over the real numbers:

x^2 + x - 42 = 0

The left hand side factors into a product with two terms:

(x - 6) (x + 7) = 0

Split into two equations:

x - 6 = 0 or x + 7 = 0

Add 6 to both sides:

x = 6 or x + 7 = 0

Subtract 7 from both sides:

Answer: x = 6 or x = -7

PLEASE HELP!! I will mark the brainliest if you can explain your answer!! I think it’s either b or c..... but I’m not sure!!! Pls help!!
(Attached below isn’t the question and the answer choices)

Answers

Answer:

A(x) = 6.2 - 0.005x

Step-by-step explanation:

If you think about it, either 0.5/0.005 needs to be equal to 0.5%

0.5 is the same as 1/2 and therefore it is the same as 50%

So it must be 0.005!

Tip: I always just divide by 100 to get the decimal, it is a nice, easy and quick method

Please answer correctly !!!!! Will mark brainliest !!!!!!

Answers

I belive your answer should be letter B

Answer:

c

Step-by-step explanation:

the correct choice is c

5. Janet Gilbert is director of labs. She has some extra capacity and has contracted with some small neighboring hospitals to run some of their lab tests. She has recently had a study conducted and has determined that her costs of these contracts are $10,000 of which $7,000 are for supplies and items related to each test. She currently charges an average of $10.00 per lab test. She is thinking of lowering her price by 20 percent in hopes of raising her current volume of 10,000 tests by 15 percent.

Answers

Answer:

Check the explanation

Step-by-step explanation:

Present predicted

Revenue - per test 10000 8000

Variable cost - per test 7000 7000

Contribution – per test 3000 1000

Net income (10,000 test – 11,500 tests) 30,000,000 11,500,000

Area between two shapes circles ixl

Answers

I don’t understand the question

A boat travels upstream for 96 miles in 4 hours and returns in 3 hours traveling downstream in a river. What is the rate of the boat in still water and what is the rate of the current?

Answers

Answer:

Speed of boat in still water = 28 miles/hr

Speed of current = 4 miles/hr

Step-by-step explanation:

Speed upstream, u = 96/4 = 24 miles/hr

Speed downstream, v = 96/3 = 32 miles/hr

Speed of boat in still water = ½(v+u)

= ½ (24 + 32) = 28 miles/hr

Speed of the current = ½ ( v - u)

= ½ (32 - 24) = 4 miles/hr

A child's sandbox is 5 feet wide, 4 feet long, and 3 feet deep. Grace fills the sandbox so that the sand is 2 ½ feet deep. What is the volume of the sand in the box?

Answers

Answer:

the volume of sand is [tex]50 ft^{3}[/tex]

Step-by-step explanation:

This problem bothers on the mensuration of solid shapes, rectangular prism.

Given data

[tex]Length l= 4 ft Width w= 5ft\\Height h = 3ft[/tex]

if the sandbox is filled with sand of [tex]2\frac{1}{2 } ft[/tex] deep the volume of the sand in the box will be calculated based on the the depth of the sand

converting the depth of sand from mixed fraction to proper fraction we have [tex]2\frac{1}{2} = \frac{5}{2}[/tex]

the expression for the volume of a rectangular prism is

[tex]volume of sand = length * width* height[/tex]

substituting our data into the expression we have

[tex]volume of sand= 5*4 * \frac{5}{2} \\volume of sand = \frac{100}{2} \\volume of sand = 50 ft^{3}[/tex]

What the missing value X^2-20x+—

Answers

Answer:

it is -1x2

Step-by-step explanation:

by the ex variable u will get it

Someone can help me in this question!

Answers

Answer:

ACB=61°, BAC=58°, AEF=65°

Step-by-step explanation:

C = 122°, 180-122=58° ACB= 122°÷2=61°

61°+61°+A=180, hence 58°

65 because of opposite angles, they are equal

Please help!
You flip a coin twice.

What is the probability of getting tails and then getting heads?

Write your answer as a percentage.


___%

Answers

Your answer would be 25%.

Assuming the coin is not biased, the probability of flipping a heads or tails is 1/2 equally. This remains the same no matter how many times you flip the coin, because the outcome of one flip does not affect the outcome of another.

This means that the probability of getting a tails the first flip is 1/2, and the probability of then getting a heads is also 1/2, so to find the probability of both happening you need to multiply these probabilities together, and 1/2 × 1/2 = 1/4, and 1/4 as a percentage is 25%.

I hope this helps! Let me know if you have any questions :)

Help with this question asap!!

Answers

Answer:

1st option.

[tex]\sum_{k=1}^{6} \frac{1}{2k-1}[/tex]

Step-by-step explanation:

The given sequence is as follows:

[tex]1 + \dfrac{1}{3}+ \dfrac{1}{5}+ \dfrac{1}{7}+ \dfrac{1}{9}+ \dfrac{1}{11}[/tex]

Here, we can see that the denominator is in AP and the sequence is:

1, 3, 7, 9, 11

first term, a  = 1

Common difference, d = 2

We know that nth term for an AP:

[tex]a_n = a+(n-1)d[/tex]

where a is the first term and

d is the common difference.

So, nth term for above AP:

[tex]a_n = 1+(n-1)\times 2\\\Rightarrow 2n-1[/tex]

Here, we have 'k' in place of 'n':

[tex]a_k = 2k-1[/tex]

And as per the given sequence in the question, the kth term is simply the reciprocal:

i.e. [tex]\dfrac{1}{2k-1}[/tex]

and sum is to be done up to k = 6 from k = 1.

Hence, the summation notation for the sequence

[tex]1 + \dfrac{1}{3}+ \dfrac{1}{5}+ \dfrac{1}{7}+ \dfrac{1}{9}+ \dfrac{1}{11}[/tex]

is:

[tex]\sum_{k=1}^{6} \frac{1}{2k-1}[/tex]

Simon took out a zero-interest loan for $3,300 to buy a boat. He must pay $300 per month to pay off the total balance of the boat's purchase price. Simon also has $1,000 in his savings account. He plans to deposit $600 every month in this account. So, Simon would like a system of equations that tells him at what point he will be able to pay off the total balance for the boat with the help of his savings. Write the second equation in the system. Enter the correct answer in the box. Substitute numerical values into the expression for all known variables.

Answers

Answer:

After 3 months, Simon will be able to pay off his loan with the money he holds at his savings account.

Step-by-step explanation:

ending loan's principal balance = beginning loan's principal balance - number of months x $300

or we can simplify it:           l₁ = l₀ - 300x ⇒ l₁ = 3,300 - 300x

l₁ = ending loan's principal balance

x = number of months

ending savings account balance = beginning savings account balance + number of months x $600

or we can simplify it:         s₁ = s₀ + 600x ⇒  s₁ = 1,000 + 600x

s₁ = ending savings account balance

x = number of months

account balances for months

                                    month 1        month 2         month 3         month 4

boat loan                     $3.000         $2,700          $2,400           $2,100

savings account          $1,600         $2,200          $2,800           $3,400

Answer:

y equals 300x plus 3300

Step-by-step explanation:

Use the remainder theorem to determine whether x - 2 is a factor of

f(x) = x3 + 3x2 - x - 18


A)

Yes, x - 2 is a factor of f(x) because f(2) = 0



B)

No, x - 2 is not a factor of f(x) because f(2) = 0



C)

Yes, x - 2 is a factor of f(x) because f(-2) = -12



D)

No, x - 2 is not a factor of f(x) because f(-2) = -12

Answers

Answer:

A

Step-by-step explanation:

To determine if (x - 2) is a factor of f(x)

Evaluate f(2) and if equal to zero then (x - 2) is a factor

f(2) = 2³ + 3(2)² - 2 - 18

     = 8 + 12 - 2 - 18

     = 0

(x - 2) is a factor of f(x) because f(2) = 0 → A

The answer to the question "Use the remainder theorem to determine whether x - 2 is a factor of [tex]f(x) = x^3+3x^2-x-18[/tex]" is option A: Yes, x - 2 is a factor of f(x) because f(2) = 0

The given function is:

[tex]f(x) = x^3+3x^2-x-18[/tex]

The function [tex]f(x) = x^3+3x^2-x-18[/tex] is divided by x - 2

x - 2 will be a factor of [tex]f(x) = x^3+3x^2-x-18[/tex] only if f(2) = 0

Substitute x = 2 into [tex]f(x) = x^3+3x^2-x-18[/tex]

[tex]f(2) = 2^3 + 3(2)^2 - 2 - 18\\\\f(2) = 8 + 3(4) - 2 - 18\\\\f(2) = 8 + 12 - 20\\\\f(2) = 20 - 20\\\\f(2) = 0[/tex]

Since f(2) = 0, then we  can conclude that x - 2 is a factor of  [tex]f(x) = x^3+3x^2-x-18[/tex]

Learn more here: https://brainly.com/question/22237647

Determine the intercepts of the line

Answers

Answer:

x-intercept (-7,0)

y-intercept (0,2)

Step-by-step explanation:

Answer:

x-intercept (-7 , 0)

y-intercept (2 , 0)

x intercept is where on the x - aces a point is sitting on on the line

--------------------------     <--- this one is x

y intercept is where on the y- aces a point is sitting on the line

║    <---- this one is y

Find the length of the hypotenuse in each right triangle.

(Do 2 of each)

Answers

Answer:

2.

a. 14 cm

b. 17 cm

c. 6 cm

d. 8 cm

3.

a. 22 cm

b. 36 cm

c. 16 cm

d. 15 cm

4.

a. 10 cm

b. 40 cm

c. 28 cm

Step-by-step explanation:

The Pythagorean Theorem states the sum of two sides length equals the length of the hypotenuse of the triangle.

Hope this helps!!! PLZ MARK BRAINLIEST!!!

A survey asked only girls to identify their favorite item on the
school cafeteria menu

A. Unbiased sample

B. Biased sample​

Answers

Answer:

B

Step-by-step explanation:

A biased sample is a sample that does not accurately represent the population.

The survey asked only girls, but we can assume this school has both boys and girls. Therefore, by only asking girls, it creates a bias, because the boys in the school are not represented.

Therefore, the correct choice is B: biased sample.

Square root of 8.8 up to two decimal step by step explanation

Answers

Answer:

2.97

Step-by-step explanation:

8.8 = 4 *2.2 = 4 * 220/100

220 = 4 *55

8.8 = (4 *4*55)/100 = 16 *55/100

[tex]\sqrt{8.8} =\sqrt{(16 * 55)}/\sqrt{100\\}[/tex]

[tex]\sqrt{8.8}= \frac{4}{10}*\sqrt{55}[/tex]

≈[tex]\sqrt{8.8} = 0.4 * 7.416 = 2.9664 \\2.97[/tex]

how would you solve 4x - 3y = 78 2x + 3y = 48 by elimination

Answers

Answer:

x = 21, y = 2

Step-by-step explanation:

4x- 3y = 78....(1)

2x + 3y = 48 ...(2)

Adding eqiautions (1) and (2)

4x- 3y = 78

2x + 3y = 48

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

6x + 0 = 126....(Here y has been eliminated)

6x = 126

[tex] x= \frac{126}{6}\\\\

\therefore x = 21\\[/tex]

Plugging x = 21 in equation (2) we find:

2 * 21 + 3y = 48

42 + 3y = 48

3y = 48 - 42

3y = 6

[tex] y= \frac{6}{3}\\\\

\therefore y = 2\\[/tex]

What is 3x10^7 x 8x10^4 in standard form

Answers

Answer:

They are already in standard form.

Step-by-step explanation:

Divide ( 4x2 - 24x + 35 ) / ( 2x - 5 )

Answers

Answer:

the closest i got is [tex]\frac{43-24x}{2x-5}[/tex]

Step-by-step explanation:

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