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ziro4ka [17]
3 years ago
6

A ball, dropped vertically, falls d metres in t seconds.

Mathematics
1 answer:
Sergio [31]3 years ago
8 0

Answer:

455m

Step-by-step explanation:

We know that acceleration is acceleration due to gravity, which is 10m/s, and initial speed u=0m/s

Use the motion equation to find distance when t=10:

d=ut+(1/2)at²

d=0t+(1/2)(10)(10²)

d=500m

The distance travelled in the seven seconds following the first three = 500-45=455m

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Which expression is equivalent to 7h^2-252k^2?
gulaghasi [49]

Answer:

c

Step-by-step explanation:

252 = 7 *36

36 = 6 *6 = 6²

a² -b²  = (a + b)(a - b)

7h² - 252k² =  7(h² - 36k²)

                   = 7(h² - [6k]² )

                  = 7(h  +6k)(h - 6k)

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3 years ago
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If A and B are independent events, P(A and B) =​
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Answer:

<u>If A and B are independent events, P(A and B) =​ P (A) * P (B)</u>

Step-by-step explanation:

Let's recall that independent events means that when one event occurs, it has no impact or influence on the probability of another event occurring. Here’s an example. Let’s say that we have two events, A and B.  

Event A : it rains in Seattle

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<u>P(A and B) =​ P (A) * P (B)</u>

4 0
3 years ago
Help me pls giving 25 points
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The answer to this question is Letter B.
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The annual expenditure of the US federal government is approximately 444 trillion dollars.
Alexeev081 [22]

Answer:

4 x 10^8 metres.

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5 0
3 years ago
Solve 81^x = 27^^^x + 2.<br><br> A. x = 1<br> B. x = 2<br> C. x = 5<br> D. x = 6
omeli [17]

Answer:

x=6

Step-by-step explanation:

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3 years ago
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