Answer: 2718
Step-by-step explanation:
Given: Mean score = 85
Standard deviation = 5
Let x be the score of a random student that follows normal distribution.
Then, the probability that a student scored between 90 and 95 will be

The number of students scored between 90 and 95 = 0.1359 x (Total students)
= 0.1359 (20000)
= 2718
Hence, The number of students scored between 90 and 95 = 2718
Answer:Its B,C, and E man
Step-by-step explanation:
Answer:
x = -7, 7
Step-by-step explanation:
- 2x²-50 = x² -1
- 2x²-x²-50+1 = 0
- x²-49 = 0
- (x+7)(x-7)
- x = -7, 7
Interest = principle * rate * time...
I = PRT...we are going to rearrange this because we are looking for the principle...
I / (RT) = P
I = 22.40
R = 2.8%...turn to a decimal = 0.028
T = 1
sub and solve
22.40 / (0.028(1) = P
22.40 / 0.028 = P
800 = P....amount of original deposit is $ 800 <==
Answer:
B
Step-by-step explanation:
13/8 because when simplified into a decimal would be 1.625 and if you round would be 2 so you take out the decimal