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devikapal101
19.09.2019 •
Mathematics
Asap the function graphed approximates the height of a rock, in meters, x seconds after it falls from a cliff
after about how many seconds is the rock 20 m above the ground
1.5 s
1.9s
2.2s
2.7s
Solved
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Ответ:
The vertical numbers are the distance and the horizontal numbers are the time in seconds.
Look at where the line is located at the number 20.
It si between the 2 and the 3 on the horizontal line, but you can see it is closer to the 2 than it is the 3, so the time would be 2.2s
Ответ:
2.2 seconds
Step-by-step explanation:
The attached graph shows the height of a rock after it falls from a cliff. Let after t seconds the rock is 20 meters from the ground.
If the graph is not given we can calculate the time using the second equation of motion i.e.
Where
u is the initial speed of the rock
a is the acceleration of the rock
t is the time taken
Here, distance covered is in y axis and the time taken is in x axis. Approximately, at 2.2 seconds the rock is 20 meters above the ground. Hence, this is the required solution.
Ответ:
You will pay $13.52 for this shirt.
Step-by-step explanation: 0.9435
Since the tax is 7.5%, you have to multiply 12.58 by 7.5% to find the amount of money paid as tax.
7.5% = 0.075
12.58 x 0.075 = 0.9435
Since we are dealing with money we have to round to the nearest hundredth -- 0.9435 = 0.94
Then to find the final cost of the shirt, we have to add 12.58 and 0.94 to get $13.52.