4.

1 answer:

6 0

Answer:

The current speed of Sarah is 8 m/s.

Explanation:

Speed:

''It is the distance travel in per unit time". It tells the capacity of moving object how fast it is moving.

Unit:

The system international unit of speed is m/s. It can also be given in Km/h

Formula:

r = d / t

r = speed (it can also be represented by v)

t = time taken to cover the distance

d = distance

Given data:

Distance = 400 m

Time = 50 s

Speed = ?

Solution:

v = d/ t

v = 400m / 50 s

v = 8 m/s

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Vika [28.1K]

I believe your answer is B.

8 0

3 years ago

Elanso [62]

The by-product of the chlorination of an alkane is HCl

Explanation:

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