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qwelly [4]
4 years ago
13

If we ignore wind resistance the time in seconds it takes for an object to fall S feet by t=1/4[s. Thus an object will fall 100

feet in t=1/4[100=1/4-10=2.5 seconds.
How long would it take an object dropped off a building to fall 1089 feet?

t=____
Mathematics
1 answer:
Nataly [62]4 years ago
4 0

Answer:

The time taken by object to dropped the distance of 1089 feet .

Step-by-step explanation:

Given as :

The distance cover by object to fall = 100 feet

The Time taken by the object to fall = 2.5 seconds

Let the speed of the object = s feet/ sec

Now, Speed = \dfrac{\textrm Distance}{\textrm Time}

or, Speed = \dfrac{\textrm 100}{\textrm 2.5}

∴ Speed = 40 feet per sec

Now, again

Distance cover by object = 1089 feet

∵ Speed of object = 40 feet per sec

Let The Time taken at 40 feet per sec = t sec

So, Time = \dfrac{\textrm Distance}{\textrm Speed}

Or , Time = \dfrac{\textrm 1089}{\textrm 40}

or, t = 27.22 seconds

Hence The time taken by object to dropped the distance of 1089 feet . Answer

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An orchard has 651 orange trees. The number of rows exceeds the number of trees per row by 10. How many trees are there in a row
natima [27]

Answer:

The number of trees in each row is  21.

Step-by-step explanation:

Let us assume the number of trees in each row  = m

So, the number of rows in the orchard = Number of trees in each row + 10

or, total number of trees in each row = (10 +m)

Now, Total number of Trees = Number of Rows x Number of trees in 1 row

⇒ 651  = m (m + 10)

651 = m^2 + 10m\\\implies  m^2 + 10m - 651 =0\\or,   m^2 + 31m  21m - 651 =0\\or, m(m +31) -21(m+31) =0\\\implies (m +31) (m-21) = 0

⇒ (m +31) = 0, or (m-21) = 0

⇒ m= -31, or m = 21

Now, as m = The number of trees in each row, so m ≠ -31

So, m =  21

Hence, the number of trees in each row is m = 21.

8 0
4 years ago
3x + 2.3 = 11.6 help please
Zielflug [23.3K]

<u><em>Solution:</em></u>

<u><em></em></u>x=3.1

Hope this helps!

6 0
2 years ago
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Penelope buys bracelets in bulk at a cost of $8 each to sell at her store. She uses a markup of 125%, which is added to the brac
navik [9.2K]
The correct answer is A. $18

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3 0
3 years ago
HELP ME PLEASE!!!!
horsena [70]
2\sqrt5+3\sqrt5-\sqrt5=(2+3-1)\sqrt5=4\sqrt5\\\\\text{Answer:}\ 4\sqrt5
Look at the square root like "x", then
2\sqrt5+3\sqrt5-\sqrt5=/2x+3x-x=4x/=4\sqrt5

3 0
3 years ago
HELP ASAP I HAVE TO GET IT DONE<br><br><br> Solve for x in the diagram below
MA_775_DIABLO [31]

Answer:

x = 35

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Geometry</u>

  • Definition of a Line: A line is 180°

Step-by-step explanation:

<u>Step 1: Set up equation</u>

40° + (2x + 30)° + 40° = 180°

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Combine like terms:                    2x + 110 = 180
  2. Subtract 110 on both sides:         2x = 70
  3. Divide 2 on both sides:               x = 35
7 0
3 years ago
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