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:
A
Step-by-step explanation:
A function have the inverse only if it passes the horizontal line test ,
For the given options we need to look for the function which passes the horizontal line test
Option A is g(x)= 2x-3 which is a straight line with slope not equal to 0 so it passes the horizontal line test and hence it will have an inverse which is also a function.
Option B: we need to restrict the domain to get the inverse so the option B is not correct .
Option C : It also fails the horizontal line test .
Option D : Horizontal line so it also fails the horizontal line test .
Since a=2 it will be 5x2 which equal 10, plus 6
Answer:
8 ≥ x+3 or x ≥ 12
Step-by-step explanation:
The sum of a number (additon) and 3 (x+3) is no more than (so less than or equal to eight) OR is more than 12 ( x is more than 12, x ≥ 12 )
