Answer:
47.5%
Step-by-step explanation:
Find the z-scores:
z = (x − μ) / σ
z₁ = (300 − 400) / 50 = -2
z₂ = (400 − 400) / 50 = 0
300 is 2 standard deviations below the mean, and 400 is 0 standard deviations from the mean.
From the empirical rule, 95% of a normal distribution is between -2 and +2 standard deviations. Since normal distributions are symmetrical, that means half of that is between -2 and 0 standard deviations.
95% / 2 = 47.5%
Answer:
1. −7
Step-by-step explanation:
--------------------------------------------------------
3a+20=-25
Subtract 20 from both sides
3a=-45
Divide both sides by 3
a=-15
Final answer: a=-15
The number of students that are expected to enroll in the fifth year of the plan is 644.
<h3>How many students are expected to enroll in the fifth year?</h3>
The formula that can be used to determine the future value of the population is:
FV = P (1 + r)^n
- FV = Future value
- P = Present value
- R = rate of increase
- N = number of years
400 x (1.1)^5 = 644
To learn more about future value, please check: brainly.com/question/18760477
#SPJ1
My guess is B since you need a formula to put them together and have it organized
