Answer:

Step-by-step explanation:
Notice that with the provided information they are given you not ust the slope of the line (-2), but also the y-intercept (the point where the line crosses the y-axis which happens when x=0).
So you can directly write the equation of the line in slope-intercept form [
where "m" is the slope and "b" the y-value when x=0].
Such gives us:

Answer:
144
Step-by-step explanation:
Given
mean=35 psi
std dev=2 psi
distribution normal
For probability that X<38,
calculate
Z score = (X-mean)/std dev
=(38-35)/2=1.5
P(X<38)
=P(Z<1.5)
=0.9331928 from tables.
So probability that the strength of a random sample <38 pis = 0.9332
Answer:3 hours
Step-by-step explanation: