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
Zinaida [17]
3 years ago
5

A student solved for the radius of a circle with a circumference of 12π

Mathematics
1 answer:
padilas [110]3 years ago
3 0

Answer:

Step 4 is incorrect  he did not divide correctly from step3 to step 4

Step-by-step explanation:

The circumference of a circle is

C = 2 * pi *r

We know the circumference is 12 pi

12pi = 2 pi *r

Divide each side by 2 pi

12 pi/2pi = 2pi r/ 2pi

6 = r

From step 3 The student did not cancel the pi in the top and the bottom on the right hand side to isolate r

In step 4 he got 6 =pi r  instead of pi

You might be interested in
Write the mixed number as a fraction 4 1/3, 1 2/5, 3 2/3
nasty-shy [4]
To get they total number of the fraction, you first times the bottom,  by the number one the side of the mixed number, and then add the top number to the answer. so for the first one, 3*4 = 12 + 1 = 13 so the answer is 13/3, for the next one, 5*1 = 5 + 2 = 7, so the answer is 7/5, and for the last one, 3*3 = 9 + 2 = 11, so the answer is 11/3                                                                                      so if your to lazy to read this the answers are                                                        1. 13/3                                                                                                                2. 7/5                                                                                                                  3. 11/3
5 0
3 years ago
Eve is making a bird house. To make the walls she takes a piece of wood and cuts it into 4 pieces in the ratio 5:6:6:7. The long
allsm [11]

Answer:

The original piece of wood is 108 cm

Step-by-step explanation:

From the given ratio, the shortest is of the ratio 5 and the longest is of the ratio 7

Let the original piece of wood be x

so the sum of the ratios will be;

5 + 6 + 6 + 7 = 24

the shortest length would be 5/24 * x

= 5x/24

the longest will be 7/24 * x = 7x/24

From the question;

7x/24 -5x/24 = 9

(7x-5x) = 24(9)

2x = 24(9)

x = (24 * 9)/2

x = 108 cm

4 0
3 years ago
Please help. What is the value of the expression when a = 3 and b = 2?     3a^3 + 2b^3
algol [13]
The answer is B. 97 3 x 27 + 2 x 8
8 0
3 years ago
What is the simplified fraction for 6%?
mr Goodwill [35]

Answer:

6/10?

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
How to write 30000+300+3 in standard form​
Elis [28]

Answer:

30303

Step-by-step explanation:

math bro

7 0
3 years ago
Other questions:
  • I WILL AWARD BRAINLIEST!! PLEASE HELP!!
    9·1 answer
  • Please help I don't know how to explain
    13·1 answer
  • Cherries cost ​$4​/lb. Grapes cost ​$2.50​/lb. You can spend no more than ​$15 on​ fruit, and you need at least 5 lb in all. Cre
    7·1 answer
  • -Ready
    11·1 answer
  • Which is higher 214.7 or 214.275
    11·1 answer
  • . Given the following diagram. (a) Name the minor arc __________ Name the major arc ___________ (b) If the minor arc is 112°, wh
    11·2 answers
  • I don't understand this problem
    9·1 answer
  • Find the x- and y-intercepts of the graph of the equation.
    14·2 answers
  • Algebra 2 help please!
    12·1 answer
  • Please help will mark Brainliest​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!