Answer:
34 rolls
Step-by-step explanation:
For Frank to cover his whole ceiling, he needs paper that will cover
20 ft x 20 ft
20 x 20 = 400 ft
So, Frank needs to cover 400 ft of the ceiling. He has to split up this large need for paper into smaller rolls, because the rolls he can buy are small.
If each roll has 12 ft, we need to find how many 12-feet are in 400 feet.
To do this, we should divide
400 / 12
= 33.333
Because Frank cannot cover the whole ceiling using only 33 rolls, he has to buy an additional roll to make sure he can cover the extra area [that would be left over if he were to only buy 33 rolls, which would only cover 396 feet]
So, Frank will need to buy 34 rolls to have enough paper to entirely cover his ceiling.
The binomial distribution is given by,
P(X=x) =
q = probability of failure = 1-0.2 = 0.8
n = 100
They have asked to find the probability <span>of obtaining a score less than or equal to 12.
</span>∴ P(X≤12) =
where, x = 0,1,2,3,4,5,6,7,8,9,10,11,12
∴ P(X≤12) =
+
+
+
+
+
+
Evaluating each term and adding them you will get,
P(X≤12) = 0.02532833572
This is the required probability.
Answer: 40% and 0.4
Step-by-step explanation:
Answer:
7. im only in middle school but i think you have to take 496 and list its factors, then once you find the right pair, check to see if the difference is 238.
IM TRYING PLEASE DONT YELL AT ME HDBHNSJDGD
The equivalent expressions are (b) (7 * 7)^x , (c) 7^x * 7^x and (e) 7^(2x)
<h3>How to determine the equivalent expressions?</h3>
The expression is given as:
49^x
Express 49 as 7 * 7
(7 * 7)^x ---- option (b)
Express 7 * 7 as an exponent
7^(2x) ---- option (e)
Express 2x as x + x
7^(x +x)
Expand
7^x * 7^x --- option (c)
Hence, the equivalent expressions are (b), (c) and (e)
Read more about equivalent expressions at:
brainly.com/question/27911936
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