1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Crank
3 years ago
14

The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with me

an 266 days and standard deviation 16 days. What percent of pregnancies last between 240 and 270 days (roughly between 8 months and 9 months)?
Mathematics
1 answer:
andrey2020 [161]3 years ago
5 0

Answer:

0.5466

Step-by-step explanation:

Given that the  length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days and standard deviation 16 days.

Let X be the length of pregnancies

X is N(266,16)

To find out the probability that pregnancies last between 240 and 270 days (roughly between 8 months and 9 months)

P(240<x<270)

convert each into Z score as z=\frac{x-266}{16}

x=240 means Z = -1.625

x=270 means z=0.25

Required prob

= P(-1.625

You might be interested in
Find the perimeter of a rectangle with a length of 6x+3 and a width of -2x-5.
blsea [12.9K]
The simple way of calculating a perimeter is to add all of the sides.
For a rectangle this would equal 2 x length + 2 x width
P = 2(6x + 3) + 2(-2x - 5)
= 12x + 6 - 4x - 10
= 8x - 4

At a higher level both the length and width must be greater than zero (= zero is a trivial rectangle)
6x + 3 > 0
6x > -3
x > -0.5

-2x - 5 > 0
2x + 5 < 0 (multiplying by -1 reverses the inequality)
2x < -5
x < -2.5

This rectangle cannot exist as x cannot be < -2.5 and > -0.5 at the same time!
8 0
3 years ago
Read 2 more answers
Log2x (2x^2+8x-6) =2
irinina [24]

Answer:

2x^3+8x^2-3x=0

Step-by-step explanation:

2x (2x^2+8x-6)=2\\multiply-all-in-bracets-by-2x\\4x^3+16x^2-6x=2\\devide-all-by-2\\2x^3+8x^2-3x=0

5 0
3 years ago
Which other angles could be in that triangle?
CaHeK987 [17]

The other angles in the isosceles triangle with an angle of 100° will be 40°

Step-by-step explanation:

Lets define an isosceles triangle first.

"An isosceles triangle is a triangle with two equal sides and two equal angles.

Given that an angle of the triangle is 100°

We know that the sum of internal angles of a triangle is 180°

The sum of remaining two angles is:

=180°-100°

=80°

As the triangle is an isosceles triangle, the two angles will be equal.

So the angles will be:

=\frac{80}{2}\\=40

The other angles in the isosceles triangle with an angle of 100° will be 40°

Keywords: Triangle, isosceles triangle

Learn more about isosceles triangle at:

  • brainly.com/question/9231234
  • brainly.com/question/9214411

#LearnwithBrainly

7 0
3 years ago
Please help will give brainlist if its correct
Ugo [173]

Answer:

I think it's B

Step-by-step explanation:

x = -2

2 + x > -8

2 + -2 > -8

0 > -8

4 0
3 years ago
Read 2 more answers
6 lb 4 oz − 5 lb 10 oz =
FinnZ [79.3K]
The answer to your problem is 10 oz
5 0
3 years ago
Read 2 more answers
Other questions:
  • The price of a pie is now $11. how many pies are sold? how many pies does each producer make? how many producers are there? how
    12·1 answer
  • 2x + y = 10<br> y = -2x + 8
    7·2 answers
  • If the two triangles shown are similar (i.e. their
    15·2 answers
  • 99 POINTS! A right prism has height 7½ and triangular bases with sides of length 5, 12, and 13 What is the: a Volume of the pris
    9·2 answers
  • Which triangles are similar?
    11·1 answer
  • Half of an orange juice mixture is orange concentrate. Explain why the ratio of orange concentrate to water is 1 : 1.
    11·2 answers
  • Show work or reported!
    6·1 answer
  • I really need help on this plz help me....​
    5·1 answer
  • A normal random variable with mean and standard deviationboth equal to 10 degrees Celsius. What is the probability that the temp
    10·1 answer
  • Air-USA has a policy of booking as many as 22 people on an airplane that can only seat 20 people. (Past studies have revealed th
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!