Answer:
see explanation
Step-by-step explanation:
In 13 - 17
Consider the factors of the constant term which sum to give the coefficient of the x- term
13
x² - x - 42 = (x - 7)(x + 6)
15
x² + x - 6 = (x + 3)(x - 2)
17
x² - 27x + 50 = (x - 25)(x - 2)
19
r² - 25 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b) , thus
r² - 25
= r² - 5² = (r - 5)(r + 5)
<span>(7.99 - B)/B = 1.63
</span><span>7.99 - B = 1.63B
1.63B + B = 7.99
2.63B = 7.99
B = 7.99 / 2.63
B = 3.04</span>
Answer: 0.9996
Step-by-step explanation:
Given : The monthly electrical utility bills of all customers for the Far East Power and Light Company are known to be normally distributed with a mean 
Standard deviation : 
Sample size : n=100
Let X be the random variable that represents the electricity utility bill for a randomly selected month .
z-score : 
For X = $75.00

Now, the probability that the average bill for those sampled will exceed $75.00 will be :-

Hence, the probability that the average bill for those sampled will exceed $75.00 =0.9996
It’s definitely is A,D, and C