Answer:
Every 10 seconds
Step-by-step explanation:
The bob crosses its midline whenever cos(2π(t-2)/20)=0.
Since cosθ=0 when θ=±π/2 + 2πn, we can find then the bob crosses its midline by solving:
2π(t-2)/20 = ±π/2 + 2πn
t-2 = ±5+20n
The solutions are when t = -3, 7, 17, 27, 37, ...
Therefore, the bob passes its midline every 10 seconds.
X+y=5
x-y=3
x=3+y
(3+y)+y=5
2y+3=5
2y=2
y=1
x=4
The answer is 1 and 4
607.20(130/100)(20/100)=$157.872
$157.87 to nearest cent
Answer:
d
Step-by-step explanation:
sorry if im wrong
Answer:
Its about plants
Step-by-step explanation: