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Naily [24]
3 years ago
15

The mean amount of time it takes a kidney stone to pass is 14 days and the standard deviation is 6 days. Suppose that one indivi

dual is randomly chosen. Let X=time to pass the kidney stone. Round all answers to two decimal places.
Mathematics
1 answer:
Likurg_2 [28]3 years ago
8 0

The probability that a person will take longer than 21 days to pass it is 0.12

<u>Explanation:</u>

Given:

Mean time, μ = 14 days

Standard deviation, ρ = 6 days

Let x be the time to pass the kidney stones.

Probability that a person will take longer than 21 days to pass it.

We need to find z score first

Z score = \frac{x - u}{p}

Z score = \frac{21-14}{6}

            = 1.166

Probability that a person will take longer than 21 days to pass it = P(x > Z)

                                                                                                          = P(x > 1.16)

                                                                                                          = 0.12

Therefore, the probability that a person will take longer than 21 days to pass it is 0.12

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the area of a rectangular living room is 300 square feet. the length of the room is 10 feet less than twice the width
JulsSmile [24]

Answer:

The length is 20, and the width is 15.

Step-by-step explanation:

You have to write an expression to represent this situation. w can be the width, and the length can be 2w-10. To fnd the area, you multiply these together. w(2w-10) is 2w^2 -10w. From there, 15 is the only value of w that satisfies the equation, so w=15. Substitute 15 into your expression for lngth, and 2(15)-10 is 30-10 is 20, so the length is 20.

6 0
4 years ago
Without working out the multiplication, which product is larger, why? 3 × 1/5 or 3 × 1/10 A) 3 × 1/5 because 1/5 is less than 1/
sp2606 [1]
The answer to that question is b
6 0
3 years ago
Need answer to finish test
PilotLPTM [1.2K]

Answer:

D 30 but im not sure i would go with D tho

Step-by-step explanation:

it might also be a but im not sure sorry

7 0
3 years ago
#6 - Calculate the monthly payment necessary to retire the following loan
klemol [59]

9514 1404 393

Answer:

  A)  $1350

  B)  $5850

  C)  $162.50

Step-by-step explanation:

A) The interest is given by the formula ...

  I = Prt

where P is the principal amount, r is the interest rate, and t is the number of years.

  I = $4500×0.10×3 = $1350

The interest owed is $1350.

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B) At maturity, the principal and interest are due. That amount is ...

  $4500 +1350 = $5850

The maturity value is $5850.

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C) If the maturity value is paid in 36 equal monthly installments, each is ...

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The monthly payment is $162.50.

4 0
3 years ago
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ryzh [129]

Answer:

C. (3x2 - 10) (x - 2)

Step-by-step explanation:

3x^2 - 16x +20

Step 1: Sum = - 16x

Product = 60x^2

Step 2: Find 2 numbers that their sum is -16 and their product is 60. If you do that correctly, then you will get two numbers: 10 and -6

Step 3: Replace -16x with the two numbers found in step 2, then you will have; 3x^2 - 6x - 10x + 20

Step 4: Factorise the equation in step 3, like so;

(3x^2 - 6x)(- 10x + 20)

3x(x - 2) -10(x - 2)

(3x - 10)(x - 2)

To check if the answer is correct, expand the bracket: (3x - 10)(x - 2)

If the bracket is opened properly, you will get 3x^2 - 16x + 20

4 0
3 years ago
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