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
jek_recluse [69]
2 years ago
5

The area of a circle is 30.85cm2. Find the length of the radius rounded to 2 DP

Mathematics
1 answer:
Alex17521 [72]2 years ago
4 0

Answer: 3.13

Step-by-step explanation:

You might be interested in
Use stokes' theorem to evaluate c f · dr where c is oriented counterclockwise as viewed from above. f(x, y, z = xyi + 5zj + 7yk,
Helga [31]
The intersection can be parameterized by

C:=\mathbf r(t)=\begin{cases}x(t)=6\cos t\\y(t)=6\sin t\\z(t)=5-6\cos t\end{cases}

with 0\le t.

By Stoke's theorem, the integral of \mathbf f(x,y,z)=xy\,\mathbf i+5z\,\mathbf j+7y\,\mathbf k along C is equivalent to

\displaystyle\int_C\mathbf f(x(t),y(t),z(t))\cdot\mathrm d\mathbf r(t)=\iint_S\nabla\times\mathbf f\,\mathrm dS

where S is the region bounded by C. The line integral reduces to

\displaystyle\int_0^{2\pi}(36\sin t\cos t\,\mathbf i+(25-30\cos t)\,\mathbf j+42\sin t\,\mathbf k)\cdot(-6\sin t\,\mathbf i+6\cos t\,\mathbf j+6\sin t\,\mathbf k)\,\mathrm dt
=\displaystyle\int_0^{2\pi}(54(\cos3t-\cos t)-30(3\cos2t-5\cos t+3)+(126-126\cos2t)\,\mathrm dt
=\displaystyle\int_0^{2\pi}(36+96\cos t-216\cos2t+54\cos3t)\,\mathrm dt
=72\pi
4 0
3 years ago
Which of the binomials below is a factor of this expression? 4x^2 - 25y^2 z^2
Y_Kistochka [10]

Answer:

2x - 5yz is the answer

7 0
3 years ago
12) Write the equation of a rational function
aev [14]

Answer:

\frac{4(x - 5)(x + 7)(x - 12)}{(x + 1)(x)(x - 12)}

Step-by-step explanation:

A rational function is

\frac{p(x)}{q(x)}

where q(x) doesn't equal zero.

If p is a asymptote, or hole at that value, then we will use

(x - p)

Step 1: We have asymptote as 0 and -1 so our denomiator will include

(x - 0)(x - ( - 1)

Which is

(x)(x + 1)

So our denomator so far is

\frac{p(x)}{x(x + 1)}

Step 2: Find Holes.

Since 12 is the value of the hole,

(x - 12)

is a the binomial.

This will be both on the numerator and denomator so qe have

\frac{(x - 12)}{x(x + 1)(x - 12)}

Step 3: Put the x intercepts in the numerator.

Since 5 and -7 is the intercepts,

\frac{(x - 12)(x - 5)(x + 7)}{x(x + 1)(x - 12)}

Step 4: Horinzontal Asymptotes,

Multiply the numerator and denomiator out fully,

\frac{  {x}^{3} - 10 {x}^{2}  - 59x + 420 }{ {x}^{3} - 12 {x}^{2}   + x - 12}

Take a L

look at the coefficients,

Notice they have the same degree,3, this means if we divide the leading coefficents, we will get our horinzonral asymptote.

Multiply the numerator by 4.

\frac{4(x - 12)(x - 5)(x - 7)}{x(x + 1)(x - 12)}

Above is the function,

5 0
2 years ago
A bicycle tire has a diameter of 62 cm.
MrRa [10]

Answer:

1947.78 inches or 162.31 feet.

Step-by-step explanation:

the circumference of any given circle is its diameter times pi. So, if you multiply the diameter times pi and then the circumference by 10 you get the number of inches traveled, if you divide that by 12 you get the number of feet traveled.

5 0
3 years ago
Read 2 more answers
What's 89x50 equaled too
Norma-Jean [14]
The answer is...4450
5 0
3 years ago
Read 2 more answers
Other questions:
  • Without trade, jake consumes 20 pounds of green beans and 80 punds pf corn and jane consumes 40 pounds of green beans and 40 pou
    10·1 answer
  • What is the measure of Angle DEF?
    14·1 answer
  • Help it's so hard for me​
    6·2 answers
  • Jessica bought 3/4 lb of berries. Mary bought 1/6 lb of berries less the jessica. what is the total weight of berries in pounds
    9·1 answer
  • One more math question for the night. please show work :0
    7·2 answers
  • Which equation represents a line that passes through (2 -1/2) and has a slope of 4
    10·1 answer
  • I need a linear equation.
    7·1 answer
  • Helppppp pleaseeeeeee
    7·1 answer
  • If you know the answer to this question please help!! 7th grade math
    10·1 answer
  • A car filled with x kg of gasoline consumes <img src="https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Clarge%7B%5Cfrac%7B100%2Bx%7D%
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!