Answer:
y = -1/4x + 3
Step-by-step explanation:
Step 1: Write out known variables
m = -1/4
y = -1/4x + b
Step 2: Find <em>b</em>
2 = -1/4(4) + b
2 = -1 + b
b = 3
Step 3: Rewrite equation
y = -1/4x + 3
a. Let
be a random variable representing the weight of a ball bearing selected at random. We're told that
, so

where
. This probability is approximately

b. Let
be a random variable representing the weight of the
-th ball that is selected, and let
be the mean of these 4 weights,

The sum of normally distributed random variables is a random variable that also follows a normal distribution,

so that

Then

c. Same as (b).
A because all percentages has 0.00 and if u take that and times it by that number you will get the price that u want
U gots do 19000 * 6%
0.06 eqs 6% bb
19000 * 0.06 es $<u>1140 a YEAR</u>