students are growing plants under different conditions. the average plant growth during a week is 3.5 inches. the difference from the average for Ji is 2 1/4 in., Gayle -2 7/10 in., Stefan 1.5 cm and Ricardo -2.4 cm. How do you find the actual height of each plant? what are the actual plant heights in inches? Order the students' plants from least to greatest.
just add the differences to the average.
Clearly the results will be in the same order as the differences.
Thank you very much
To find the actual height of each plant, you need to add or subtract the respective differences from the average plant growth. Let's calculate the actual plant heights step by step:
1. Ji's Plant:
Given that Ji's plant has a difference from the average of 2 1/4 inches, you need to add this difference to the average height:
3.5 inches + 2 1/4 inches = 3.5 inches + 9/4 inches
To add the two fractions:
Convert the whole number to a fraction: 3.5 inches = 14/4 inches.
Add the fractions: 14/4 inches + 9/4 inches = 23/4 inches.
Therefore, Ji's plant height is 23/4 inches, or 5 3/4 inches.
2. Gayle's Plant:
Given that Gayle's plant has a difference from the average of -2 7/10 inches, you need to subtract this difference from the average height:
3.5 inches - 2 7/10 inches = 3.5 inches - 27/10 inches
To subtract the two fractions:
Convert the whole number to a fraction: 3.5 inches = 35/10 inches.
Subtract the fractions: 35/10 inches - 27/10 inches = 8/10 inches.
Therefore, Gayle's plant height is 8/10 inches, or 0.8 inches.
3. Stefan's Plant:
Given that Stefan's plant has a difference from the average of 1.5 cm, you need to convert this measurement to inches before adding it to the average height.
1.5 cm is equal to 1.5/2.54 inches (because there are 2.54 cm in 1 inch).
1.5/2.54 inches = 0.59 inches (rounded to the nearest hundredth).
Therefore, Stefan's plant height is 0.59 inches.
4. Ricardo's Plant:
Given that Ricardo's plant has a difference from the average of -2.4 cm, you need to convert this measurement to inches before subtracting it from the average height.
-2.4 cm is equal to -2.4/2.54 inches.
-2.4/2.54 inches = -0.94 inches (rounded to the nearest hundredth).
Therefore, Ricardo's plant height is -0.94 inches.
Now let's order the student's plants from least to greatest:
Ordering from least to greatest:
1. Ricardo's plant: -0.94 inches.
2. Gayle's plant: 0.8 inches.
3. Stefan's plant: 0.59 inches.
4. Ji's plant: 5 3/4 inches (or 5.75 inches).
So the plants, from least to greatest, are: Ricardo's, Gayle's, Stefan's, and Ji's.