# Calculate the length of the circumference of a circle with radius of 7cm

Length (diameter)= 7 + 7
= 14 cm
Circumference = 2 x pi x r
= 2 x pi x 7
= 14 pi

Hope this helps ^_^

~Top

## Related Questions

What is the answer to this problem? - 4x + 3 = -37​

Step-by-step explanation:

Step-by-step explanation:

Step 1: Subtract 3 from both sides.

−4x+3−3=−37−3

−4x=−40

Step 2: Divide both sides by -4.

-4x/4 = -40/4

What times what equals 31

The only numbers that can equal 31 are 31x1 and 15.5 times 2. Hope this helped
31x1=31, explanation: 3x1=3 1x1=1, 3 plus 1 is 31

Given: KL ║ NM NM = 52, m∠M = 36° KN ⊥ NM , NL ⊥ LM Find: KN and KL

KN = 24.727 units

KL = 17.966 units

Step-by-step explanation:

It is given that NM = 52 units and m∠M=36 degrees.

The triangle LMN in right angled triangle. By using trigonometry,

sin(36) =

cos(36) =

Thus, LN = 52(sin(36)) and LM = 52(cos(36))

Construct a line from L to MN , which is perpendicular to NM, and the point on NM be point A.

In triangle LMA, LA = (LM)(sin(36)). Further, as rectangle KNAL is formed,

LA = KN = (LM)(sin(36)) = (52)(sin(36))(cos(36)) = 24.727 units.

In triangle LAN, AN = (LN)(cos(54)). As rectangle KNAL,

KL = AN =(LN)(cos(54)) = (52)(sin(36))(cos(54)) =  17.966 units.

Seniors at a certain high school took a survey regarding future plans. All plan to attend college some time; however, 77% plan to go to college immediately following high school. Of those who plan to attend college immediately following high school, 18% plan to major in Math. Of those who do not plan to attend college immediately following high school, 11% plan to major in Math. What is the probability that a randomly chosen senior does not plan to attend college immediately following high school and plans to major in Math. a) 0.1386
b) 0.1800
c) 0.8900
d) 0.0253
e) 0.1100
f) None of the above.

The correct option is d) 0.0253

Step-by-step explanation:

Consider the provided information.

When two events, X and Y, are dependent, then the probability of both occurring is:

All plan to attend college some time; however, 77% plan to go to college immediately following high school.

Let X represents the Plan to go to college.

P(X) = 0.77

P(X') = 1 - 0.77 = 0.23

Of those who plan to attend college immediately following high school, 18% plan to major in Math. Of those who do not plan to attend college immediately following high school, 11% plan to major in Math.

Let Y represents Major in Math.

P(Y|X) = 0.18 and P(Y|X') = 0.11

Therefore the required probability is:

Hence, the correct option is d) 0.0253

What percentage of 9th-grade boys are likely to be involved in drinking?

The correct answer of the given question above would be 33.9%. The percentage of 9th grade boys that are likely to be involved in drinking is 33.9%. Whereas, for binge drinking, the percentage result is 18.8%. But the alcohol use among youths has declined.
87% because most teens will have a source to alcohol.

3x-4y-4x+2x+5-y how would you solve by adding like terms?

3x-4y-4x+2x+5-y
3x-4x+2x-4y-y+5
x-5y+5

Given the functions: f(x) = 4x + 6, g(x) = 2x2, find (fg)(x). A.) 8x^3 + 12x2
B.) 2x^2 + 4x + 6
C.) 8x + 12
D.) 8x^2 + 12x

To answer the this item, simply multiply the given functions,
(f·g)(x) = f(x)  x g(x)
Plugging in the expression,
(f·g)(x) = (4x + 6)(2x²)
= 8x³ + 12x²
Thus, the answer to this item is letter A. 8x^3 + 12x^2.
Just mutlpilpy
(4x+6)(2x^2)=8x^3+12x^2

two customers went to a post office to buy postcards and envelopes. Each postcard costs the same amount, and each large envelope costs the same amount. The first customer paid \$12 for 34 postcards and 5 large envelopes. The second customer paid \$24.80 for 10 postcards and 15 large envelopes. What was the cost in dollars of each large envelpoe

The cost of postcard is \$0.122 and the cost of large envelope is \$1.57.

Step-by-step explanation:

Let, the cost of postcards = x and the cost of large envelopes = y.

According to the question, we get the following system of equations,

34x + 5y = 12

10x + 15y = 24.80

We will now solve this system to obtain the value of x and y.

First, we divide second equation by 5,

34x + 5y = 12

2x + 3y = 4.96

Now, we multiply second equation by 17,

34x + 5y = 12

34x + 51y = 84.32

Subtracting the equations gives us,

-46y = -72.32 i.e. y = 1.57.

Substituting the vale of y in the first equation gives us,

34x + 5 × 1.57 = 12 i.e. 34x + 7.85= 12 i.e. 34x = 4.15 i.e. x = 0.122.

Hence, the cost of postcard is \$0.122 and the cost of large envelope is \$1.57.

The cost of 1 postcard is \$0.12 and the cost of 1 large envelop is \$1.58.

Step-by-step explanation:

Let x be the cost of the postcard and y be the cost of the large envelop.

First customer paid \$12 for 34 postcards and 5 large envelopes.

So, 34x + 5y = 12 --- (1)

Second customer paid \$24.80 for 10 postcards and 15 large envelopes.

So, 10x + 15y = 24.8 --- (2)

Multiply the first equation by 3, we get,

(1) × 3 implies     102x + 15y = 36

(2)      implies       10x + 15y = 24.8

Subtracting, we get,

92x = 11.2

x = 0.12

Substitute in (1), we get,

34(0.12) + 5y = 12

4.08 + 5y = 12

5y = 12 - 4.08

5y = 7.92

Divide both sides by 5.

y = 1.58

Hence, the cost of 1 postcard is \$0.12 and the cost of 1 large envelop is \$1.58.

Victoria borrowed \$500 for college textbooks. The interest rate was 6%. She plans to pay back her loan in 6 months. How much will she pay in interest? What will be the total amount that she pays back?