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amm1812
3 years ago
14

Use single digits times a power of 10 to estimate the number 0.00005423

Mathematics
1 answer:
VashaNatasha [74]3 years ago
4 0

Answer:   5.423 × 10^-5

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A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by th
iris [78.8K]

Answer:

t = 15.42 s

Step-by-step explanation:

A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation.

y=-16x^2+242x+73

We ned to find the time when the rocket will the ground. For this, y = 0

-16x^2+242x+73=0

It is a quadratic equation whose solution is given by :

x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}

Here, a = -16, b = 242 and c = 73

x=\dfrac{-b+ \sqrt{b^2-4ac} }{2a}, x=\dfrac{-b-\sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-242+ \sqrt{(242)^2-4(-16)(73)} }{2(-16)}, x=\dfrac{-242- \sqrt{(242)^2-4(-16)(73)} }{2(-16)}\\\\=-0.295\ s, 15.42\ s

Neglecting negative value.

So, it will hit the ground in 15.42 s.

5 0
3 years ago
What is the value of x in the diagram? A. 100 B. 60 C. 50 D. 120
kompoz [17]
Im pretty sure it is D
hope you get this right
7 0
4 years ago
Read 2 more answers
Why might u want to estimate by rounding each value to the nearest $1 instead of to the nearest $5
Aleksandr [31]
You would want to round to the nearest $1 so that the total would be more accurate.
6 0
3 years ago
What is the scale factor of the dilation?
Anvisha [2.4K]

Answer:

divide by 2

Step-by-step explanation:

to go to 12 to 6 , you will have to divide by 2

12/2 = 6

12 and 6 are on the same side in both triangles , that is why I used those two numbers to figure out the scale factor

7 0
3 years ago
Work out the length of CD <br> Answer to 3 significant figures
vladimir1956 [14]

Answer:

26

Step-by-step explanation:

I can  be wrong but i most likely sure it is correct because a triangle is 180 degrees you have to add 102 with 52 take that total and subtract it with 180 to find that angle is what you need to find the length. Again i am not sure but might be right.

5 0
4 years ago
Read 2 more answers
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