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
katrin [286]
3 years ago
6

The radius of a circle is 2.9 in. Find the circumference to the nearest tenth (help please)

Mathematics
2 answers:
nika2105 [10]3 years ago
4 0

Answer:4.18

Step-by-step explanation:

2.9+2/9

laiz [17]3 years ago
3 0

Answer:18.2in

Step-by-step explanation:

circumfernce =2 pi r

pi=22/7

c=2 x 22/7 x 2.9

c=18.2 in

You might be interested in
Use long division:<br> 3x2 + 2x-5<br> 3x-1
uysha [10]
This is the answer just open it.

5 0
3 years ago
Read 2 more answers
FIRST TO ANSWER GET BRAINLEST.
Lostsunrise [7]

Answer:

I believe the answer is B sorry if I'm wrong

3 0
3 years ago
Write an equation of a parabola that passes through (3,-30) and has x-intercepts of -2 and 18. Then find the average rate of cha
Nookie1986 [14]

Answer:

The equation of the parabola is y = \frac{2}{5}\cdot x^{2}-\frac{32}{5}\cdot x -\frac{72}{5}.  The average rate of change of the parabola is -4.

Step-by-step explanation:

We must remember that a parabola is represented by a quadratic function, which can be formed by knowing three different points. A quadratic function is standard form is represented by:

y = a\cdot x^{2}+b\cdot x + c

Where:

x - Independent variable, dimensionless.

y - Dependent variable, dimensionless.

a, b, c - Coefficients, dimensionless.

If we know that (3, -30), (-2, 0) and (18, 0) are part of the parabola, the following linear system of equations is formed:

9\cdot a +3\cdot b + c = -30

4\cdot a -2\cdot b +c = 0

324\cdot a +18\cdot b + c = 0

This system can be solved both by algebraic means (substitution, elimination, equalization, determinant) and by numerical methods. The solution of the linear system is:

a = \frac{2}{5}, b = -\frac{32}{5}, c = -\frac{72}{5}.

The equation of the parabola is y = \frac{2}{5}\cdot x^{2}-\frac{32}{5}\cdot x -\frac{72}{5}.

Now, we calculate the average rate of change (r), dimensionless, between x = -2 and x = 8 by using the formula of secant line slope:

r = \frac{y(8)-y(-2)}{8-(-2)}

r = \frac{y(8)-y(-2)}{10}

x = -2

y = \frac{2}{5}\cdot (-2)^{2}-\frac{32}{5}\cdot (-2)-\frac{72}{5}

y(-2) = 0

x = 8

y = \frac{2}{5}\cdot (8)^{2}-\frac{32}{5}\cdot (8)-\frac{72}{5}

y(8) = -40

r = \frac{-40-0}{10}

r = -4

The average rate of change of the parabola is -4.

3 0
3 years ago
What is the absolute value of –27? <br><br> A.<br> –27<br><br> B.<br> 27
Serga [27]
Absolute value makes it positive
answe is 27
the answer is B

6 0
3 years ago
Read 2 more answers
What other expression is equivalent as 8x6?
uysha [10]
An equivliant to 8x6 is 6x8
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the simplified form of the expression k^3(K^7/5)^-5
    8·1 answer
  • Of 11 available candidates for membership in a university committee, 6 are men and 5 are women. the committee is to consist of 4
    15·1 answer
  • What is 3 times 9/100
    14·2 answers
  • Translate 3 units to the right and then rotate 180 around the origin
    10·1 answer
  • A circle with area 36pi has a sector with a central angle of 48°. what is the area of the sector?
    14·1 answer
  • Please explain what the answer is step by step.
    13·2 answers
  • What is the range of the following relation?<br>{(5,0), (6, -1), (1, 4), (0,5), (2,3)}<br>​
    5·1 answer
  • Question 2 (1 point) Solve 2d - 7= 8-34. O a d- 5 Oь d = -15 Ос d=-1 5 Od Submit<br>​
    11·1 answer
  • Help pls i need this good grade​
    6·1 answer
  • After selling half his old games, Sam went and bought 8 new ones. He
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!