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
vodomira [7]
3 years ago
10

A circular Park of radius 30m has a track of width 2.5m on its innet side.find the area of the track.​

Mathematics
2 answers:
tatiyna3 years ago
8 0

Step-by-step explanation:

mark upper one as brainliest

BabaBlast [244]3 years ago
7 0

This is a pretty mathematical question, so I will answer it in pieces as I get the time to work it out. To find the time it takes to fall, you start with Newton's second law, ma=m[d2r/dt2]=-GMm/r2=dv/dt and integrate it once to get v=dr/dt=√[2GM(R-r)/(Rr)] where, for your question, R is the distance from the center of the earth to the point from which it was dropped, r is where it is at the time t(r), G is the universal gravitation constant, and M is the mass of the earth. (The mass m of the ship does not matter.) (You can more easily get v(r) from energy conservation.) Next integrate v(r)=dr/dt to get t(r)=-2.69x105{0.5tan-1((2x-1)/(2√[x(1-x)]-√[x(1-x)]-π/4} where x=r/R; this is not a simple integral to perform, but you can find good integrators on the web, for example Wolfram Alpha. Once you have gotten the indefinite integral you are not finished, you need to find the integration constant which will put the ship at rest at x=r/R=1; that is where the π/4 comes from. Putting in your numbers, I find t=4.22x105 s=117 hr=4.89 days. The figure shows the graph of t(x).

You might be interested in
((PLEASEEE HELPP MEE))
andrezito [222]

Answer:

D.

Step-by-step explanation:

In order to eliminate, the numbers must eliminate. If the second equation is multiplied by 3, then the 3 and the -3 can be eliminated. Since it is multiple choice, we can plug in x = 12 and y = 10 to see if they are correct. 12 + 30 = 42 and 24 - 10 = 14, so D is correct.

3 0
2 years ago
FIRST GET BRAINIEST PERIODTT TYSMMSMSMMSM
ValentinkaMS [17]
4+4+6+6=12+8=20

hope this helps
7 0
2 years ago
Read 2 more answers
Compare the exponential functions f, g, and h which are shown below.
Nostrana [21]
Hello,
Please, see the detailed answer in the attached files.
Thanks.

5 0
3 years ago
HELP PLEASE KHAN ACADAMY
pychu [463]

Answer:

-45

Step-by-step explanation:

4 0
3 years ago
What is the measure of ∠H?
jek_recluse [69]
B. 73
360-102-138-47=73
5 0
3 years ago
Read 2 more answers
Other questions:
  • (06.01 MC) What is the value of the expression shown below? 8 + (7 + 1) 2 ÷ 4 ⋅ 1 over 2 whole to the power of 4. Whoever gets t
    6·1 answer
  • Peter sells 10 wallets in 2 days. After 40 days how many wallets should be sold?
    5·1 answer
  • -16 a rational number
    7·1 answer
  • PLA HELP ME ASAP FOR 12 and 13 (SHOW WORK!!!!!) + LOTS OF POINts!
    6·1 answer
  • CAN ANY EXPERT HELP ME SOLVE THIS RHOMBUS
    5·1 answer
  • What is the value of Y?
    11·1 answer
  • Pat bounces a basketball 25 times in 30 seconds. At that rate, approximately how many fimes will Pat bounces the ball in 150 sec
    14·2 answers
  • Marcy picked 3 times as many ounces of kale as Phil. Phil picked 42ounces of kale. How many ounces of kale did Marcy picked?
    14·1 answer
  • 1 and 5/7 x 1/6 simplify
    9·1 answer
  • What are my chances...
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!