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Sagot :
To analyze the growth trends for the boys in Paul's family and determine the correct option, we need to calculate the differences in height between each age period for each boy. The given heights in feet and inches need to be converted to inches first, then we will calculate the growth increments.
### Step-by-Step Calculation:
Let's convert the heights to inches. Each foot is 12 inches.
#### Paul
- Age 8: [tex]\(4'8'' \Rightarrow (4 \times 12) + 8 = 56 \)[/tex] inches
- Age 12: [tex]\(5'0'' \Rightarrow (5 \times 12) = 60 \)[/tex] inches
- Age 16: [tex]\(5'11'' \Rightarrow (5 \times 12) + 11 = 71 \)[/tex] inches
- Age 20: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
- Age 24: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(60 - 56 = 4\)[/tex]
- 12 to 16: [tex]\(71 - 60 = 11\)[/tex]
- 16 to 20: [tex]\(73 - 71 = 2\)[/tex]
- 20 to 24: [tex]\(73 - 73 = 0\)[/tex]
#### Bruce
- Age 8: [tex]\(4'6'' \Rightarrow (4 \times 12) + 6 = 54 \)[/tex] inches
- Age 12: [tex]\(4'11'' \Rightarrow (4 \times 12) + 11 = 59 \)[/tex] inches
- Age 16: [tex]\(5'10'' \Rightarrow (5 \times 12) + 10 = 70 \)[/tex] inches
- Age 20: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
- Age 24: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(59 - 54 = 5\)[/tex]
- 12 to 16: [tex]\(70 - 59 = 11\)[/tex]
- 16 to 20: [tex]\(73 - 70 = 3\)[/tex]
- 20 to 24: [tex]\(73 - 73 = 0\)[/tex]
#### Tom
- Age 8: [tex]\(4'9'' \Rightarrow (4 \times 12) + 9 = 57 \)[/tex] inches
- Age 12: [tex]\(5'0'' \Rightarrow (5 \times 12) = 60 \)[/tex] inches
- Age 16: [tex]\(6'0'' \Rightarrow (6 \times 12) = 72 \)[/tex] inches
- Age 20: [tex]\(6'2'' \Rightarrow (6 \times 12) + 2 = 74 \)[/tex] inches
- Age 24: [tex]\(6'2'' \Rightarrow (6 \times 12) + 2 = 74 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(60 - 57 = 3\)[/tex]
- 12 to 16: [tex]\(72 - 60 = 12\)[/tex]
- 16 to 20: [tex]\(74 - 72 = 2\)[/tex]
- 20 to 24: [tex]\(74 - 74 = 0\)[/tex]
#### Steve
- Age 8: [tex]\(4'7'' \Rightarrow (4 \times 12) + 7 = 55 \)[/tex] inches
- Age 12: [tex]\(4'11'' \Rightarrow (4 \times 12) + 11 = 59 \)[/tex] inches
- Age 16: [tex]\(5'11'' \Rightarrow (5 \times 12) + 11 = 71 \)[/tex] inches
- Age 20: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
- Age 24: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(59 - 55 = 4\)[/tex]
- 12 to 16: [tex]\(71 - 59 = 12\)[/tex]
- 16 to 20: [tex]\(73 - 71 = 2\)[/tex]
- 20 to 24: [tex]\(73 - 73 = 0\)[/tex]
### Calculating Average Growth for Each Period
- Between ages 8 to 12: [tex]\((4, 5, 3, 4) \Rightarrow \frac{4 + 5 + 3 + 4}{4} = 4.0\)[/tex]
- Between ages 12 to 16: [tex]\((11, 11, 12, 12) \Rightarrow \frac{11 + 11 + 12 + 12}{4} = 11.5\)[/tex]
- Between ages 16 to 20: [tex]\((2, 3, 2, 2) \Rightarrow \frac{2 + 3 + 2 + 2}{4} = 2.25\)[/tex]
- Between ages 20 to 24: [tex]\((0, 0, 0, 0) \Rightarrow \frac{0 + 0 + 0 + 0}{4} = 0.0\)[/tex]
### Conclusion
Examining the average growth calculations:
- The largest average growth occurs between 12 to 16 years (average = 11.5 inches).
Therefore, the correct conclusion about the growth trend is:
c. Between the ages of 12 and 16, all four boys had the biggest jump in height.
### Step-by-Step Calculation:
Let's convert the heights to inches. Each foot is 12 inches.
#### Paul
- Age 8: [tex]\(4'8'' \Rightarrow (4 \times 12) + 8 = 56 \)[/tex] inches
- Age 12: [tex]\(5'0'' \Rightarrow (5 \times 12) = 60 \)[/tex] inches
- Age 16: [tex]\(5'11'' \Rightarrow (5 \times 12) + 11 = 71 \)[/tex] inches
- Age 20: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
- Age 24: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(60 - 56 = 4\)[/tex]
- 12 to 16: [tex]\(71 - 60 = 11\)[/tex]
- 16 to 20: [tex]\(73 - 71 = 2\)[/tex]
- 20 to 24: [tex]\(73 - 73 = 0\)[/tex]
#### Bruce
- Age 8: [tex]\(4'6'' \Rightarrow (4 \times 12) + 6 = 54 \)[/tex] inches
- Age 12: [tex]\(4'11'' \Rightarrow (4 \times 12) + 11 = 59 \)[/tex] inches
- Age 16: [tex]\(5'10'' \Rightarrow (5 \times 12) + 10 = 70 \)[/tex] inches
- Age 20: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
- Age 24: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(59 - 54 = 5\)[/tex]
- 12 to 16: [tex]\(70 - 59 = 11\)[/tex]
- 16 to 20: [tex]\(73 - 70 = 3\)[/tex]
- 20 to 24: [tex]\(73 - 73 = 0\)[/tex]
#### Tom
- Age 8: [tex]\(4'9'' \Rightarrow (4 \times 12) + 9 = 57 \)[/tex] inches
- Age 12: [tex]\(5'0'' \Rightarrow (5 \times 12) = 60 \)[/tex] inches
- Age 16: [tex]\(6'0'' \Rightarrow (6 \times 12) = 72 \)[/tex] inches
- Age 20: [tex]\(6'2'' \Rightarrow (6 \times 12) + 2 = 74 \)[/tex] inches
- Age 24: [tex]\(6'2'' \Rightarrow (6 \times 12) + 2 = 74 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(60 - 57 = 3\)[/tex]
- 12 to 16: [tex]\(72 - 60 = 12\)[/tex]
- 16 to 20: [tex]\(74 - 72 = 2\)[/tex]
- 20 to 24: [tex]\(74 - 74 = 0\)[/tex]
#### Steve
- Age 8: [tex]\(4'7'' \Rightarrow (4 \times 12) + 7 = 55 \)[/tex] inches
- Age 12: [tex]\(4'11'' \Rightarrow (4 \times 12) + 11 = 59 \)[/tex] inches
- Age 16: [tex]\(5'11'' \Rightarrow (5 \times 12) + 11 = 71 \)[/tex] inches
- Age 20: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
- Age 24: [tex]\(6'1'' \Rightarrow (6 \times 12) + 1 = 73 \)[/tex] inches
Growth (in inches):
- 8 to 12: [tex]\(59 - 55 = 4\)[/tex]
- 12 to 16: [tex]\(71 - 59 = 12\)[/tex]
- 16 to 20: [tex]\(73 - 71 = 2\)[/tex]
- 20 to 24: [tex]\(73 - 73 = 0\)[/tex]
### Calculating Average Growth for Each Period
- Between ages 8 to 12: [tex]\((4, 5, 3, 4) \Rightarrow \frac{4 + 5 + 3 + 4}{4} = 4.0\)[/tex]
- Between ages 12 to 16: [tex]\((11, 11, 12, 12) \Rightarrow \frac{11 + 11 + 12 + 12}{4} = 11.5\)[/tex]
- Between ages 16 to 20: [tex]\((2, 3, 2, 2) \Rightarrow \frac{2 + 3 + 2 + 2}{4} = 2.25\)[/tex]
- Between ages 20 to 24: [tex]\((0, 0, 0, 0) \Rightarrow \frac{0 + 0 + 0 + 0}{4} = 0.0\)[/tex]
### Conclusion
Examining the average growth calculations:
- The largest average growth occurs between 12 to 16 years (average = 11.5 inches).
Therefore, the correct conclusion about the growth trend is:
c. Between the ages of 12 and 16, all four boys had the biggest jump in height.
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