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Tanzania [10]
3 years ago
6

An observation deck extends 311 feet out above a valley. The deck sits 261 feet above the valley floor. If an object is dropped

from the observation​ deck, its height h in​ feet, after t​ seconds, is given by h=-16t²+261. How long will it take for the object to be 5 feet above the valley​ floor?
Mathematics
2 answers:
Andreas93 [3]3 years ago
6 0

Answer:

4.12

Step-by-step explanation:

its 4.12 mark me brainiless

mamaluj [8]3 years ago
3 0

Answer:

  • 4 seconds

Step-by-step explanation:

<u>Find the value of t in the following equation:</u>

  • -16t² + 261 = 5
  • -16t² = - 255
  • t² = 255/16
  • t = √255/4 ≈ 4 seconds
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Finger [1]

Answer:

17rx2−23rx−71x+75

Step-by-step explanation:

(17x−23)(xr−4)−(3x+17)

=(17x−23)(xr−4)+−1(3x+17)

=(17x−23)(xr−4)+−1(3x)+(−1)(17)

=(17x−23)(xr−4)+−3x+−17

=(17x)(xr)+(17x)(−4)+(−23)(xr)+(−23)(−4)+−3x+−17

=17rx2+−68x+−23rx+92+−3x+−17

=17rx2+−68x+−23rx+92+−3x+−17

=(17rx2)+(−23rx)+(−68x+−3x)+(92+−17)

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6 0
3 years ago
There were 212 089 visitors to a tourist attraction last year. Express this
Montano1993 [528]

Answer:

212,000

Step-by-step explanation:

212 089, better written as 212,089, rounds down to 212,000.

As an example, 212,589 would round up to 213,000, and

212,389 would round down to 212,000.

4 0
3 years ago
Ancy wants to make a graph to show the relationship between the temperature of water, in degrees Celsius, and the time, in secon
just olya [345]

<span>1.  It will not be spread out horizontally across the entire coordinate plane because in Step 4, Nancy selected an incorrect scale on the axis.  This is true (though I wouldn't have used the word "incorrect") but the "incorrectness" is relatively small.</span>

<span>2.  It will not be spread out vertically across the entire coordinate plane because in Step 5, Nancy selected an incorrect scale on the y-axis. This is true and the "incorrectness" is relatively large. </span>

<span>3.  It will not be spread out horizontally across the entire coordinate plane because in Step 2, Nancy plotted time instead of temperature on the axis.  This is plain nonsense!</span>

<span>4.  It will not be spread out vertically across the entire coordinate plane because in Step 3, Nancy plotted temperature instead of time on the y-axis.  This is also plain nonsense!</span>

<span>So, of the options on offer, I think 2. best describes the graph</span>

7 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAP, 50 POINTS PLEASEEE!
NeX [460]

Answer:

(0,-7) (5,3) (-5,-11) (10,1) theres a bunch of the points

hope this helps, if so hit that thanks button ;D

Step-by-step explanation:


3 0
3 years ago
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shepuryov [24]

Answer:

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4 0
3 years ago
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