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docker41 [41]
3 years ago
11

The cruising speed of the bullet train will be no less than 150 miles per hour.

Mathematics
1 answer:
Levart [38]3 years ago
8 0

Answer:

53

Step-by-step exid

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20 is how much less than 30? What percent less?
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Answer:

33.3333% decrease

Step-by-step explanation:

Percent change formula: \frac{(x-y)}{|y|} *100, where x is the new value and y is the starting value.

Plug in values and solve:

\frac{20-30}{30} *100\\\frac{-10}{30} *100\\-0.3333*100\\

-33.3333% change, or a 33.3333% decrease.

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3 years ago
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Step-by-step explanation:

Consider x⅓ =a

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A toy rocket is launched from the ground straight upward. The height of the rocket above the ground, in feet, is given by the eq
Oksanka [162]

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Although strictly speaking of mathematics i.e. theoritically,  

t

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Further, after the maximum is reached at  t = 2  (observe that first differential is  h ' ( t ) = − 32 t + 64 , which is zero at  t = 2  and second derivative  h ' ' ( t ) = − 32  is negative and at this we have  h ( 2 ) = 64 ), at  t = 4 ,  h ( 4 ) = 0  i.e. toy rocket falls back to the ground and as such, we cannot have  h > 4 .

Hence, domain for  t  is  [ 0 , 4 ] .

tbh google

8 0
3 years ago
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