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Answer:
<h3>The average weekly change in value of Jade's stock in dollars is -1.3225</h3>Step-by-step explanation:
Given that Jade invested in the stock market.
The weekly change in value of her stock, in dollars, over 4 weeks was +23.65, -22.20, -12.75 and +5.98.
<h3>To find the average weekly change in value of her stock in dollars :</h3>The average weekly change in value of Jade's stock is given by
Therefore Average=-1.3225
<h3>Therefore the average weekly change in value of Jade's stock in dollars is -1.3225</h3>we know that
The time it takes for the train to pass a single post is equal to the time it takes for the train to pass its length.
the length of the train is-----> 375 m
<u>convert to Km</u>
1 Km =1,000 m
375 m=375/1,000=0.375 Km
the speed of the train is 45 km/hour
so
by proportion
<u>convert to minutes</u>
1 hour=60 minutes
0.0083 hours=0.0083*60=0.5 minutes
<u>convert to seconds</u>
1 minute=60 sec
0.5 minutes=0.5*60=30 sec
therefore
<u>the answer is</u>
30 seconds