Answer:
The bridge is 80 feet long
Step-by-step explanation:
We will use the ratio method to solve the question
∵ The engineer used the scale 3 inch = 40 feet
∴ The scale drawing is ⇒ 3 inche : 40 feet
∵ The drawing length of the bridge is 6 inches
→ By using the ratio method
→ inch : feet
→ 3 : 40
→ 6 : x
→ By using cross multiplication
∵ 3 × x = 6 × 40
∴ 3x = 240
→ Divide both sides by 3
∴ x = 80
∵ x represents the actual length of the bridge
∴ The bridge is 80 feet long
Please double check, this is what I came up with, I hope it helps.
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Answer:
a) 37th percentile: 33 years
b) 72nd percentile: 62 years
Step-by-step explanation:
The kth percentile divides the data into two: on the one hand the lowest k% of the data, and on the other the (1-k)% higher of the data.
For the list provided, the 37th percentile falls to the age of 33. This means that 37% of the data are for ages under 33 years.
The 72nd percentile falls at the age of 62 (72% of the ages fall below 62 years).
AGE PERCENTILE
18 6%
21 9%
22 13%
25 16%
26 19%
27 22%
29 25%
30 28%
31 34%
33 38%
36 41%
37 47%
41 50%
42 53%
47 56%
52 59%
55 63%
57 66%
58 69%
62 72%
64 75%
67 78%
69 81%
71 84%
72 88%
73 91%
74 94%
76 97%
77 100%
