I=prt
I=1640*0.06*6/12=49.2
A=1640+49.2=1,689.2
Answer:
They are in A. P so the sum will be 2380
Answer: About 191 students scored between a 60 and an 80.
Step-by-step explanation:
Given : A set of 200 test scores are normally distributed with a mean of 70 and a standard deviation of 5.
i.e.
and 
let x be the random variable that denotes the test scores.
Then, the probability that the students scored between a 60 and an 80 :

The number of students scored between a 60 and an 80 = 0.9544 x 200
= 190.88 ≈ 191
Hence , about 191 students scored between a 60 and an 80.
Answer:
A.
Myra can make 18 or fewer copies
Step-by-step explanation:
Let n be the no. of copies
The cost:
5 + 3n《59
3n《54
n《18