Answer:
5
Step-by-step explanation:
Find the z-scores.
z = (x − μ) / σ
z₁ = (92 − 82) / 5
z₁ = 2
z₁ = (97 − 82) / 5
z₂ = 3
Find the probability:
P(92 < X < 97)
P(2 < Z < 3)
P(Z < 3) − P(Z < 2)
0.9987 − 0.9772
0.0215
Find the number of tests:
0.0215 (241) ≈ 5
8 plus 4 is 12 and 8 would be twice as much as 4 which is the tens place
Answer:
Step-by-step explanation:
14...................................
11 2/3 pages in 15 minutes
- 35/3 ⇔ 15
- 35/3 ÷ 15 ⇔ 15÷15
- 35/45 ⇔ 1
- 7/9 ⇔ 1
7/9 pages per min
Option B
15....................................
5 2/3 meters in 1/3 hours
- 17/3 ⇔ 1/3
- 17 ⇔ 1
- 17 meters per hour
Correct option is B