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Stels [109]
2 years ago
5

7. What is the value of x to the nearest foot? *

Mathematics
1 answer:
Katena32 [7]2 years ago
3 0
The answer is 6713 ft
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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
barxatty [35]

Step-by-step explanation:

I assume that "ground" is at 0 ft height. which is in an actual scenario not airways the case.

y = -16x² + 64x + 89

shows us that the tower is 89 ft tall (the result for x = 0, at the start).

anyway, if the original assumption is correct, then we need to solve

0 = -16x² + 64x + 89

the general solution for such a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/)2a)

in our case

a = -16

b = 64

c = 89

x = (-64 ± sqrt(64² - 4×-16×89))/(2×-16) =

= (-64 ± sqrt(4096 + 5696))/-32 =

= (-64 ± sqrt(9792))/-32

x1 = (-64 + 98.95453501...)/-32 = -1.092329219... s

x2 = (-64 - 98.95453501...)/-32 = 5.092329219... s

the negative solution for time is but useful here (it would be the time calculated back to ground at the start).

so, x2 is our solution.

the rocket hits the ground after about 5.09 seconds.

5 0
2 years ago
What does this mean?:<br> How does the data vary?<br> What is the mode?
stellarik [79]
Okay well the mode is the number that appears most pften for ex 112351 the mode is 1 because it is the number that is there more than the others
8 0
3 years ago
What is the value of x<br><br> A 19<br> B 22<br> C 67<br> D71
Novay_Z [31]

Answer:

Step-by-step explanation:

(2x+4)° + 42° = 180°

x = 67°

4 0
2 years ago
Which statement best compares the volumes of the two rectangular prisms?
Dmitry [639]

Answer:

There is not enough information to compare the volume of the prisms.

Step-by-step explanation:

To find the volume of rectangular prisms, the length , width and height must be given. The volume of rectangular prisms is gotten by multiplying the three dimension: length, width and height which is expressed in cubic units. To compare the two volumes, the three dimensions must be given.

Hence, there is not enough information to compare.

3 0
3 years ago
Ali bought 2 litre milk. he drank ⅖ litre of it. how much milk did ali has left?
oksian1 [2.3K]

Answer:

1.6 litre of milk is left

8 0
2 years ago
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