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lana66690 [7]
2 years ago
14

Math hw plz help! ill give brainliest

Mathematics
2 answers:
Debora [2.8K]2 years ago
5 0
You need to add an image
zhenek [66]2 years ago
4 0

Answer:

what is the question?

???

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The lengths of pregnancies are normally distributed with a mean of 269269 days and a standard deviation of 1515 days. a. Find th
kati45 [8]

Answer:

a. 0.38%

b. 266.75 days

Step-by-step explanation:

We have the following data, mean (m) 269 and standard deviation (sd) 15, therefore:

a. The first thing is to calculate the number z:

z (x) = (x - m) / sd

z (309) = (309-269) / 15 = 2.67

When looking in the normal distribution table (attached), we have that at this value of z, the probability is:

P (z> 2.67), that is to say we must look in the table -2.67 and this value corresponds to 0.0038, that is to say 0.38%

b. Find the z-value with a left tail of 44%, i.e. 0.44. We look in the table for this value and what value of z corresponds.

invNorm (0.44) = -0.15

Find the corresponding number of days:

x = z * sd + m

we replace

d = -0.15 * 15 + 269 = 266.75 days

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3 years ago
The distance a car has traveled can be represented by the equation d = 1.4m, where d represents the distance in miles and m repr
ValentinkaMS [17]

Answer:

It is the velocity of the car, the speed.

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3 years ago
Explain why animals can hear sounds humans can't
DedPeter [7]
Better hearing and better sound censory

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Which equation has the solution set x = (23) ?
Svet_ta [14]

Answer:

If you mean 2 and 3 it would be (x-2)(x-3)=0

Step-by-step explanation:

(x-2)=0

x-2=0 move the two on the other side to get positive

x=2

(x-3)=0

x-3=0 move the three on the other side to get positive

x=3

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PLEASE HELP!!!!! WORTH 40 POINTS
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Answer:

B : 3/2

Step-by-step explanation:

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2 years ago
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