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Komok [63]
2 years ago
9

How tall would a person be if they were 225m?​

Mathematics
1 answer:
Aleonysh [2.5K]2 years ago
6 0

225 meters = 738 feet approximately

Reason:

To convert from meters to feet, we multiply by 3.28

This is because 1 meter is roughly 3.28 feet. It's fairly close to 3 feet which is exactly one yard. A good rule of thumb could be: "1 meter stick is about the same length as a yard stick".

So 225 meters is equivalent to approximately 3.28*225 = 738 feet

For visual comparison, 738 feet is about the height of a 74 story building where every floor is 10 feet tall. Note that 738/10 = 73.8 which rounds to 74.

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An orange is shot up into the air with a catapult. The function given by h(t)+20+60t-16t² models the oranges height in feet, t s
Ganezh [65]

Answer:

  C, E

Step-by-step explanation:

As a rule, these ballistic motion equations are only applicable for heights above the final resting place. Usually, that is the ground (h=0). Time is always measured as a non-negative quantity beginning at the time of launch.

The function is meaningless after the time the object comes to rest on the ground, so the domain of the function extends from 0 until that time.

These considerations allow us to evaluate the offered statements.

  A. The domain never includes negative values. (A is not a true statement)

  B. The heights are the same at times that are symmetrical around the time of the maximum height. Here, that time is about 1.9 seconds, not 1.5 seconds, so the heights will be different at 1 and 2 seconds after launch. (B is not a true statement)

  C. The graph of the function shows the height reaches 0 at about 4.06 seconds, a little after 4 seconds. (C is true)

  D. Based on our answer to C, we know t=10 is outside the domain of the function. (D is not a true statement)

  E. The value of the function is 20 when t=0, so the function tells us the orange is 20 feet above the ground when it is launched. (E is true)

The true statements are C and E.

3 0
2 years ago
How much Zn and how much HCl should be used to produce 1.5 g ZnCl2
tatuchka [14]

Answer:

  • 0.71963 g of Zn
  • 0.80256 g of HCl

Step-by-step explanation:

The required mass of reactants can be computed from the number of moles of product.

  moles of ZnCl₂ = (1.5 g)/(136.282 g) ≈ 0.0110066 moles

Then the mass of Zn required is ...

  mass of Zn = (0.0110066 mol)(65.382 g/mol) = 0.71963 g

Two moles of HCl are used in the reaction with each mole of Zn, so the mass of HCl required is ...

  mass of HCl = 2(0.0110066 mol)(36.458 g/mol) = 0.80256 g

_____

<em>Comment</em>

The discrepancy in the last two decimal places of the weights above versus the calculator output below comes from rounding of moles of Zn to 4 significant digits, instead of 5 or more. The number of moles of ZnCl₂ is closer to 0.0110066.

4 0
3 years ago
What is the value of x
pav-90 [236]

Let's start with triangle RST. This is a 30-60-90 triangle, which means it has the relationship x - x sqrt(3) - 2x.

If RS is 2 sqrt(3), then ST must be 2 and RT must be 4.

Triangle QRT is a 45-45-90 triangle, which means it has the relationship x - x - x sqrt(2).

If RT is 4, then RQ must also be 4.

Answer: x = 4

Hope this helps!

7 0
2 years ago
Graph 40-5y=x and plot coordinates.
almond37 [142]
The graph is in the picture (0,8) (40,0)

5 0
3 years ago
Eric would like to buy a new math folder for $2.22 and a case of mechanical pencils for $2.95. He would also like to buy sticker
MrMuchimi

Answer:

0.5x+5.17:  10.00

hope it still helps

8 0
3 years ago
Read 2 more answers
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