Not sure of this, but this is what i found
Step-by-step explanation:
Formula: z = (x-μ)/σ
So, plug in the numbers.
N(14,4), find the z score for 9
x is the number you're finding, so x=9
μ is the mean, so μ = 14
σ is the st. deviation, so σ=4
Plug them in, so it's z=(9-14)/4 and you'll get your answer :)
hint: it should be a negative number
product means multiply, at least means greater than or equal to
The product of a number and 5 is at least 45: 5n ≥ 45
If asked to solve, divide 5 from both sides: n ≥ 9
Answer: 5n ≥ 45
First Way:
7: 10am to 8:00am = 50 mins
8:00am to 8:15am = 15 mins
Total = 50 min + 15 min = 65 mins = 1 hour 5 mins
Second Way:
7: 10am to 8:10am = 1 hour
8:10am to 8:15am = 5 mins
Total = 1 hour + 5 mins = 1 hour 5 mins
Answer : 1 hour 5 mins
In order to match each of the pairs you need to divide the numerator by the denominator to make it into a decimal.
Below are the pairs:
21/25 = 84%
13/20 = 65%
2/5 = 40%
3/4 = 75%
3/5 = 60%
