Step-by-step explanation:
The radius of the orbit is r = 1150 km + 6400 km = 7550 km or
![r = 7.55×10^6\:\text{m}](https://tex.z-dn.net/?f=r%20%3D%207.55%C3%9710%5E6%5C%3A%5Ctext%7Bm%7D)
and it takes 140 minutes to complete 1 revolution. This is the same aa
![140\:\text{min}×\dfrac{60\:\text{s}}{1\:\text{min}} = 8400\:\text{s}](https://tex.z-dn.net/?f=140%5C%3A%5Ctext%7Bmin%7D%C3%97%5Cdfrac%7B60%5C%3A%5Ctext%7Bs%7D%7D%7B1%5C%3A%5Ctext%7Bmin%7D%7D%20%3D%208400%5C%3A%5Ctext%7Bs%7D)
The linear speed of the satellite then is simply equal to the orbital circumference divided by the orbital period <em>T</em> or
![v = \dfrac{2\pi r}{T}](https://tex.z-dn.net/?f=v%20%3D%20%5Cdfrac%7B2%5Cpi%20r%7D%7BT%7D)
![\:\;\:\:=\dfrac{2\pi(7.55×10^6\:\text{m})}{8.4×10^3\:\text{s}}](https://tex.z-dn.net/?f=%5C%3A%5C%3B%5C%3A%5C%3A%3D%5Cdfrac%7B2%5Cpi%287.55%C3%9710%5E6%5C%3A%5Ctext%7Bm%7D%29%7D%7B8.4%C3%9710%5E3%5C%3A%5Ctext%7Bs%7D%7D)
![\:\:\:\:=5647.4\:\text{m/s}](https://tex.z-dn.net/?f=%5C%3A%5C%3A%5C%3A%5C%3A%3D5647.4%5C%3A%5Ctext%7Bm%2Fs%7D)
In km/min, this is
![v = \dfrac{2\pi(7550\:\text{km})}{140\:\text{min}} = 338.8\:\text{km/min}](https://tex.z-dn.net/?f=v%20%3D%20%5Cdfrac%7B2%5Cpi%287550%5C%3A%5Ctext%7Bkm%7D%29%7D%7B140%5C%3A%5Ctext%7Bmin%7D%7D%20%3D%20338.8%5C%3A%5Ctext%7Bkm%2Fmin%7D)
Answer: a) C = 0.126x + 1.5
b) C = 2.382 c) approximately 179 units
Step-by-step explanation: profit P(x), total revenue R(x) and total cost (C) are related by the formulae below.
Profit = total revenue - total cost
P(x) = R(x) - C
From the question, P(x) = 0.084x - 1.5, R(x) = 0.21x.
Question a)
C = R(x) - P(x)
C = 0.21x - {0.084x - 1.5}
C = 0.21x - 0.084x + 1.5
C = 0.126x + 1.5
Question b)
If C = 0.126x + 1.5, then C at x = 7 units is gotten below as
C = 0.126(7) + 1.5
C = 0.882 + 1.5
C = 2.382.
Question c)
The break even point is the point where total revenue R(x) equals total cost C.
R(x) = 0.21x and C = 0.126x + 1.5
0.21x = 0.126x + 1.5
0.21x - 0.126x = 1.5
0.084x = 15
x = 15/ 0.084
x = 178.57 which is approximately 179 units (since quantity of units can't be decimal)
It would be a rational number,c because if you are getting cents back, you are getting a decimal, which isn't a multiple of 1 so it can't be a whole number or negative number, and it can't be irrational because all cents are less than 100 which means they all terminate so they are rational.<span />
Answer:
10 km
Step-by-step explanation:
0.5*2=1 hour
5*2=10 km
Answer:
sky im going with A
Step-by-step explanation: