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astra-53 [7]
2 years ago
8

Help me pls I don’t know the answer

Advanced Placement (AP)
1 answer:
aliya0001 [1]2 years ago
5 0
Can you translate it into English please so we understand
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The 1960s and 1970s were decades of:
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Which of the following expenses would be the most likely to purchased with cash
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A ball is thrown into the air at a velocity of 44 feet per second. Its height in feet, h after t seconds is represented by the e
Lady_Fox [76]

Answer:

0.447 sec

Explanation:

velocity = distance/ time

distance 'h' is a function of time 't' given by

h = 12t^{2} + 44t + 16

⇒ differentiating equation

⇒ velocity = \frac{dh}{dt} = 24t + 44

⇒ acceleration = \frac{d^{2}h }{dt^{2} } = 24 \frac{ft}{sec^{2} }

deceleration due to gravity = -9.8 m/sec^{2} =  - 9.8 x 3.281 = - 32.154 ft/ sec^{2}

Net deceleration = 24 - 32.154 = - 8.15 ft/ sec^{2}

at maximum height v = 0

v^{2} = u^{2} + 2ah

⇒  0 = 44^{2} + 2 (-8.15)h

⇒ h = 118.72 ft⇒

118.72 = 12t^{2} + 44t + 16

⇒ 12t^{2} +44t - 102.72 = 0

⇒  t = -44 ± \sqrt{44^{2} - 4(12)(102.72) }     / (2 x 12)

t = 0.447 sec

6 0
3 years ago
Which type of technology became less important to developed countries during the late 20th century?
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write a paragraph describing three senses that circus entertainers rely on explain why it is important
Gala2k [10]
I'm glad you asked because I just watched a video about all the senses(not just five), so hope this helps. :)

Circus Performers rely on many different senses, but here are the most important ones. 

There are way more than five senses and a lot of people don't know that.
 One of the senses they use is equilibrioception. It may sound very brainy, but it's just a big word for balance. Some tightrope walkers use this.

Another sense they use is touch. This is common. All circus performers use this to perform and make their crowd laugh!
 
The last sense is Magnetoception. Another big word with small meaning. This word just means they know the direction they're going to perform.

Circus Performers rely on many different senses, but the most important ones have been stated.
7 0
3 years ago
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