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hammer [34]
3 years ago
5

Which is the better buy? 12 bars of soap for $10.00 or 5 bars of soap for $4.00

Mathematics
2 answers:
Butoxors [25]3 years ago
6 0
It is cheaper to buy 2 5packs because your total will be $8 not $10 so you end up saving $2 a dollar per pack
likoan [24]3 years ago
3 0
5 Bars of soap for $4.00 Why? Because you if you buy two it cost $8.00 or buy three pack and you'll get 15 for $12.00
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one of the comers of a cube is sliced off the resulting cross section will have a minimum of ? Sides ?
Molodets [167]

a corner of a cube connects 3 sides to each other,

 then add the side of the cut

 so it would have 4 sides

8 0
3 years ago
A cheetah spots a gazelle 300 meters away. The cheetah begins to chase the gazelle at a rate of 18 meters per second at the same
Rina8888 [55]
The cheetah runs 2 meters/sec faster than the gazelle.  Eventually the cheetah will overcome the gazelle.  Since distance = rate times time, time = distance/rate.

Thus, 

300 meters / (2 meters/sec) = 150 sec = 2 min 30 sec
8 0
3 years ago
Suppose we roll a fair six-sided die 20 times and draw ten cards from a standard 52-card deck. Let X be the number of "6"s rolle
Lera25 [3.4K]

Answer:

a) Expected value = 6.406

Variance = 4.905

Standard deviation = 2.45

b) The probability is 0.08547

Step-by-step explanation:

a) Let's suppose that:

X₁ = number of 6´s

X₂ = number of Jack, Queen, King or Aces

The mean of X₁ is:

MeanX₁ = n * p = 20 * (1/6) = 3.33

The variance of X₁ is:

Var-X_{1} =np(1-p)=3.33(1-(1/6))=2.775

The mean of X₂ is:

MeanX₂ = 10 * (16/52) = 3.076

The variance of X₂ is:

Var-X_{2} =3.076(1-(16/52))=2.13

The expect value of X is:

Xexp = MeanX₁ + MeanX₂ = 3.33 + 3.076 = 6.406

The variance of X is:

VarX = VarX₁ + VarX₂ = 2.775 + 2.13 = 4.905

The standard deviation is:

Xdevi = 4.905/2 = 2.45

b) The probability of drawing at least five six out of 20 rolls is equal to:

∑(1/6)ˣ(5/6)²⁰⁻ˣ = 0.231 with x = 5

The probability of at least 4 Jack, Queen, Kings or Aces is:

∑(16/52)ˣ(1-(16/52))¹⁰⁻ˣ = 0.37 with x = 4

The probability of given event is equal to:

P = 0.231 * 0.37 = 0.08547

5 0
3 years ago
Hello if you're able to answer this question for me please do and provide work, Thank you
Harlamova29_29 [7]
The answer is c to your question
5 0
3 years ago
(-4) (?) = -12<br><br> What is the value of the (?)
Crazy boy [7]
? = 3

-12/-4 = 3
you can check your answer by plugging it into the variable
4 0
3 years ago
Read 2 more answers
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