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lisov135 [29]
3 years ago
11

A rocket travels in a trajectory given by the equation s = -4.9t 2 + v0t, where s is meters above ground, t is time in seconds a

nd v0 is the initial velocity. If the intial velocity is 49 m/sec, after how many seconds will the rocket reach its maximum height?
Mathematics
1 answer:
Reptile [31]3 years ago
5 0

Step-by-step explanation:

s = -4.9t² + 49t

The vertex of the parabola is at t = -b/(2a).

t = -49 / (2 × -4.9)

t = 5

The rocket reaches its maximum height after 5 seconds.

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2 years ago
Richard Lens receives a 3.5% commission for selling cleaning supplies. What is his commission on sales of $122,591?
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Answer:

$4,290.69

------------------------------------------------------------------------------------------------------

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2 years ago
Read 2 more answers
At a sale this week, a desk is being sold for 128.80. This is a 72% discount from the original price. What is the original price
wel

Answer:

$460

Step-by-step explanation:

If the 128.80 is the price of the desk after a 72% discount, it means that 128.80 is 100-72=28% of the original price.

From here, we can divide 128.80 by 28 to find what 1% of the price is then multiply the value by 100 to find 100%, or the original price.

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Hope this helped!

6 0
2 years ago
Which is the correct first step for solving this equation? 2x-7=5?
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