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dalvyx [7]
3 years ago
12

If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 ft per second, then its height h

after t seconds is given by the equation h(t) = -16t ^2 + 128t. What is the height after 60 seconds?

Mathematics
2 answers:
Rufina [12.5K]3 years ago
4 0

Answer:

undefined

Step-by-step explanation:

t=60 is outside the domain of the function, which is t ∈ [0, 8].

_____

If you take the function and the time at face value, ...

... h(60) = -49920 . . . feet, more than 9.4 miles below ground level*

___

*The deepest hole ever drilled into the Earth is 40,230 feet deep, so this is almost 2 miles deeper.

KengaRu [80]3 years ago
3 0

Answer:

C) 8 seconds

Step-by-step explanation:

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Last questions, plz help
Goryan [66]

Answer:

9. a_n=7+6n

10. a_n=a_{n-1}+7

Step-by-step explanation:

9. Given the sequence

13, 19, 25, ...

In this sequence,

a_1=13\\ \\a_2=19\\ \\a_3=25\\ \\...

Note that

a_2-a_1=19-13=6\\ \\a_3-a_2=25-19=6,

then the common difference in this sequence is d=6

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a_1=13\\ \\d=6,

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10. Given the sequence

-10,-3, 4, 11, ...

In this sequence,

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Note that

a_2-a_1=-10-(-3)=-10+3=-7\\ \\a_3-a_2=-3-4=-7\\ \\a_4-a_3=11-4=7,

then the common difference in this sequence is d=7

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a_1=-10\\ \\d=7,

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schepotkina [342]

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Step-by-step explanation:

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2 years ago
A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 120 feet per secon
Makovka662 [10]

Answer:

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Step-by-step explanation:

Assuming the deceleration due to gravity is unaided by air resistance, gravity causes the ball to lose vertical speed at the rate of 32 ft/s every second. The initial vertical speed of 120 ft/s will decline to zero when t satisfies ...

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The ball will not go any higher after its vertical speed is zero.

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