1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexandra [31]
3 years ago
8

A balloon has a circumference of 23 cm. Use the circumference to approximate the surface area of the balloon to the nearest squa

re centimeter.
Mathematics
1 answer:
AveGali [126]3 years ago
5 0
To get the surface area of a sphere, we need to have the radius. We are given the circumference. The circumference formula is C=2πr.  We need to solve for r. 
23 = 2πr
r=3.66

The calculation for surface area is <span>A = 4πr^2. 
</span>A = 4<span>π(3.66)^2

Solve for A.

A= 168 cm^2.</span>
You might be interested in
Sofia, who lives in chicago, knits and sells alpaca-wool scarves. she spends 15 hours knitting one scarf. maria, who also knits,
erma4kov [3.2K]
A producer is said to have an absolute advantage over another producer when he required less amount of input to produce the same good compared to the other producer.

While a producer is said to have a comparative advantage over another producer when he produces his goods at a lesser opportunity cost compared to the other produer.

Here, time is one of the inputs used in production and Maria produces a scarf at a lesser time compared to Sofia. Thus, Maria has an absolute advantage over Maria in the production of scarves.

Therefore, the true statement is "<span>Maria has an absolute advantage over Sofia".</span>
5 0
3 years ago
&lt; ADF measures 2x degrees and &lt; FDC measures x + 12 degrees. What is the measure
gtnhenbr [62]

Answer:

<h2>Angle ADF is equal to 52° and angle FDC is equal to 38°.</h2>

Step-by-step explanation:

In the image attaches, you can observe that angles ADF and FDC are complementary angles, because they sum 90°.

\angle ADF + \angle FDC = 90\°

And we know that

\angle ADF=2x\\\angle FDC = x+12

Replacing these expressions, we have

2x+x+12=90\°\\3x=90\° - 12\°\\x=\frac{78}{3}\\ x=26

Then, we replace this value in each expression to find both angles measures.

\angle ADF= 2(26)=52\°\\\angle FDC = 26+12=38\°

Therefore, angle ADF is equal to 52° and angle FDC is equal to 38°.

7 0
3 years ago
Which of the matrixes can be added together? Choose all that apply.
katen-ka-za [31]
<h3>Answer: A and C</h3>

Both matrices are 1 x 4 matrices. This notation says there is 1 row and 4 columns. The number of rows must match up, as well as the number of columns, in order for matrix addition to be possible. This is so the corresponding elements pair up and add together. For instance, the 5 and -2 pair up and add together for matrices A and C.

4 0
3 years ago
Solve.<br> 2x + 3 = 2x - 3
WINSTONCH [101]

Step-by-step explanation:

Respuesta:13

3 0
3 years ago
Read 2 more answers
The science department orders a new telescope and pays $253.87 after tax. The tax rate is 6% . What was the original price of th
mash [69]
The price after tax is £253.87 so to find the original price you have to deduct 6% but first you need to find 6%.

Easiest way to find 6% is by finding 10% or 2% or 1% / whatever you find easiest. For me it would be 1%

If you find 1 % you would then multiple it by 6 to give you 6%

10% is £25.38 (move the decimals 1 unit)
1% is £2.54 (move decimals 2 units)
Always round up

£2.54 X 6 = £15.24

£253.87 - £15.24 = £238.63
7 0
3 years ago
Other questions:
  • Find the solution set.
    15·1 answer
  • -13=m-7 how can i get my answer
    10·2 answers
  • The product of two fractions that are each between 0 and 1 is also between 0 and 1.Is this true or false?
    13·2 answers
  • Noah starts with 0 and then adds the number 5 four times. Diego starts with 1 and then multiplies by the number 5 four times. Fo
    7·1 answer
  • W - 4 &gt; 9 on a coordinate plane
    10·1 answer
  • Find the area of a triangle with a base (b) of 7 feet and a height (h) of 12 feet.
    10·1 answer
  • Nita gana $ 20 por semana paseando al perro de su vecino. También gana $ 2 por cada rosa que vende de su jardín de rosas. Nita q
    10·1 answer
  • 24,12,6,...<br>find the 8th term.<br>​
    5·1 answer
  • Stacey has a part time job , she earns £8 an hour.
    13·1 answer
  • 5
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!