Answer: you can use 260 min, 60 min at a fixed price ($20) and extra 200.
Step-by-step explanation:
C(x) = 20 + 0.20(x − 60)
C(x) ≤ 60
20 + 0.20(x − 60) ≤ 60
0.20(x − 60) ≤ 60 - 20
0.20x - 12 ≤ 40
0.20x ≤ 40 + 12
0.20x ≤ 52
x ≤ 52/0.2
x ≤ 260
This way, you can use 260 min, 60 min at a fixed price ($20) and extra 200.
X = sqrt( 4 *(8+4))
x= sqrt(4*12)
x = sqrt(48)
x = 6.928 ( Round the answer as needed)
Density = Mass / Volume = 2000/0.5
Density = 4000 Kg/m^3
40 minutes degrees must the hour hand travel before she can go home
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