A) See the attached for a table and graph.
b) It will be 7.5 years before it is time to dig a new well.
Answer:
Step-by-step explanation:
its d
I wish I saved my answer from the other day, LOL...
we’ll use h for # of bags of hardwood mulch, and p for # of bags of pine bark mulch
h + p = 156
2h + 1.75p = 288
First we’ll solve for h in terms of p
h = 156 - p
Then substitute that into the equation with the money
2(156 - p) + 1.75p = 288
312 -2p + 1.75p = 288
-0.25p = -24
0.25p = 24
p = 96
Drop that into the equation for numbers of bags
h = 156 - p
h = 156 - 96
h = 60
Check the math:
2h + 1.75p = 288
2(60) + 1.75(96) = 120 + 168 =288
Let me know if you have questions
Answer:
calculate P(X=1) + P(X=2) +...+ P(X=12) using the binomial formula or an individual table in excel
calculate the P(X ≥ 12) using the binomial formula or a cumulative table in excel
Step-by-step explanation:
For a binomial distribution :
P(x =x) = nCx * p^x * (1 - p)^(n - x)
n = number of trials = 12 ; x = number of successes
p = probability of success = 0.2% = 0.002
1 - p = 1 - 0.002 = 0.998
Probability that atleast 1 is broken ;
p(1) + p(2) + p(3) +... + p(12) ;
This can be calculated by summing the values obtained using the binomial formula or in excel.
Alternatively, using the binomial formular or excel, the cumulative probability could be obtained as P(x ≥ 1)
