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Reptile [31]
3 years ago
7

A penny is dropped from the top of a 1,000-foot building. the function gives the height of the penny t seconds after it starts f

alling. how long will it take for the penny to reach the ground? round the answer to the nearest tenth of a second.
Mathematics
2 answers:
zzz [600]3 years ago
8 0
We consider an approximation of the gravity g=10. 
Then the speed is given by the formula: s(t)=10t.
And the coordinate is given by the formula:x(t)=5t^2+t
(integrating the speed function).
Now set up the equation:
5t^2+t=1000
Solving the above equation for t we get:t =14 seconds. 
<span>It will take 14 seconds for the penny to reach the ground.</span>
SpyIntel [72]3 years ago
7 0

Answer:

<em>It will take 14 seconds for the penny to reach the ground.</em>

<em></em>

Step-by-step explanation:

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Please Help!
svet-max [94.6K]
First car is x
second car is y
25x+30y=1550
x+y=55
Multiply the second equation by -25 for elimination method to cancel out x
-25x-25y=-1375
Add the two equations
5y=175
y=35
Plug this value into the second equation
x+35=55
x=20

Final answers:
First car=20 gallons
Second car=35 gallons
6 0
3 years ago
*when a very low mental stability and exhaustion makes you forget to put the question
Tamiku [17]

Answer:

5

Step-by-step explanation:

Think of 5 positive things and 9 negative things.

O O O  O O

P P P P P P P P P

5 of the positive things will cancel out 5 of the negative things, leaving behind 4 negative things.

#teamtrees #WAP (Water And Plant)

4 0
3 years ago
Read 2 more answers
The countries population in 1991 was 231 million . In 1999 it’s was 233 million. estimate the population in 2003 used The expone
liraira [26]

Answer:

The population in 2003 was 234  million

Step-by-step explanation:

In order to calculate the population in 2003 we would have to use the The exponential growth formula as follows:

p(y)=ir^t

According to the given data:

p(y)=233 million

i=231 million

t =1999-1991

Therefore, 233 million=231 million r^(1999-1991)

(233 million/231 million)^(1/8)=r

p(y)=231 million(233 million/231 million)^((y-1991)/8)  

Therefore, in 2003   p(2003)=231 million(233 million/231 million)^((2003-1991)/8)

p(2003)=231 million(233 million/231 million)^(1.5)

p(2003)=234  million

The population in 2003 was 234  million

7 0
4 years ago
4x − 5 = −17 what is x
Alina [70]

Answer:

<h2>x = 3</h2>

Step-by-step explanation:

<h3>4x − 5 = −17</h3>

<u>Add 5 to both sides of the equation</u>

That's

<h3>4x + 5 - 5  =  - 17 + 5 \\ 4x =  - 12</h3>

<u>Divide both sides by 4</u>

<h3>\frac{4x}{4}   =   - \frac{12}{4}  \\</h3>

We have the final answer as

<h3>x = 3 \\</h3>

Hope this helps you

3 0
3 years ago
F(n) = 7 n - 1 find the sixth term in the sequence
Natasha_Volkova [10]
7*6= 42, 42-1= 41, and that would the anwser
5 0
3 years ago
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