It’s B because the y intercept is +3
The 85th percentile is the cutoff time

such that

In other words, the 85th percentile refers to the time needed to belong to the top 15% of the distribution; more generally, the

percentile is the top

of the distribution.
Anyway, to find this value of

, transform

to a random variable

with the standard normal distribution using

where

is the mean of

and

is the standard deviation of

.

Here

is used to denote the z-score corresponding to the cutoff time

. Referring to a z-score table, you find that this occurs for

. So,
Answer:
8
Step-by-step explanation:
Given the equation 1/4 (16 + 12x) = 28, to solve this first we open the bracket using the distributive property. According to this property, given A, B and C then:
A(B+C ) = AB+AC
Step 1:
1/4 (16 + 12x) = 28
= 1/4(16)+1/4(12x) = 28
= 4+3x = 28
Step 2:
We move 4 to the other side to have:
3x = 28-4
3x = 24
Step 3:
Divide both sides by 3 to have,:
3x/3 = 24/3
x = 8
The answer is 8
Answer:
3(4x^2-3x+5)
Step-by-step explanation:
3(4x^2-3x+5)