Four students each added salt crystals to water and measured the time it took for all the crystals to disolve. The following table shows their results.
A three-column table, with column headers 'Student, 'Temperature (°C), 'and 'Time (sec).' For Marcus, the values are '10'and '65,' respectively. For Tyra, the values are '25' and '40,' respectively, For Luis, the values are '50' and '25,' respectively.' For Andrew the values are '75' and '15,' respectively.
Athena repeated the investigation using water heated to 40°C. Which is the time MOST LIKELY measured by Athena?
a) 10 sec
b) 20 sec
c) 30 sec
d) 50 sec
temps recorded/ times
10/65
25/40
50/25
75/15
Now at a temp of 40, time should be between 40 and 25 seconds, right?
So the answer would be C (30 sec), right?
20 sec
What is the mean of Joe's data?you may use the calculator
50
To determine the most likely time measured by Athena, we need to compare her results to the results of the other students and look for a pattern or trend.
First, let's analyze the data given in the table:
- Marcus used water at 10°C and it took 65 seconds for all the salt crystals to dissolve.
- Tyra used water at 25°C and it took 40 seconds for all the salt crystals to dissolve.
- Luis used water at 50°C and it took 25 seconds for all the salt crystals to dissolve.
- Andrew used water at 75°C and it took 15 seconds for all the salt crystals to dissolve.
As we can see, there is a clear relationship between temperature and the time it takes for the salt crystals to dissolve. The higher the temperature, the shorter the time it takes. This indicates that higher temperatures increase the rate of dissolving for salt crystals in water.
Athena used water heated to 40°C. Since 40°C is between the temperatures used by Tyra and Luis, we can estimate that Athena's time will fall between their measured times of 40 and 25 seconds.
Therefore, it is likely that Athena's measured time will be closer to 30 seconds (which is between 40 and 25) than to 10 or 50 seconds.
So the most likely time measured by Athena is c) 30 sec.