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Serga [27]
3 years ago
9

"A day care program has an average daily expense of $75.00. The standard deviation is $5.00. The owner takes a sample of 64 bill

s. What is the probability the mean of his sample will be between $70.00 and $80.00?"
Mathematics
2 answers:
kolbaska11 [484]3 years ago
8 0

Answer:

p=1

Step-by-step explanation:

Given that a day care program has an average daily expense of $75.00. The standard deviation is $5.00.

Sample size = 64

Std error of sample = \frac{5}{\sqrt{64} } \\=0.625

Thus sample mean will follow normal with

(75, 0.625)

Required probability

=P(70

It is almost a certain event with p =1

kirill115 [55]3 years ago
4 0

Answer:

their you go i had it wrong so thought i give someone the right answer

Step-by-step explanation:

1.0

34

1.0

34

68

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LiRa [457]

Ques 8:

The Volume(V) in cubic feet of an aquarium id modeled by the polynomial function V(x)= x^{3}+2x^{2}-13x+10

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By Factor theorem, which states that a polynomial f(x) has a factor (x - k) if and only if f(k)=0.

For this , we will substitute the value of x in the given function.

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Therefore, x=4 is not a possible rational zero.

(b) To show that (x-1) is a factor of V(x).

By Factor theorem, which states that a polynomial f(x) has a factor (x - k) if and only if f(k)=0.

Let (x-1)=0

So, x=1.

Substituting x=1 in the given function.

V(1)=1^{3}+2(1)^{2}-13(1)+10

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V(1) = 0

Therefore, (x-1) is a factor of V(x).

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Dividing the given function by (x-1).

On dividing, we get quotient as x^{2}+3x-10

So, factored form is = (x-1)(x^{2}+3x-10)

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Step-by-step explanation:

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