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Vedmedyk [2.9K]
3 years ago
12

Assume that the mean length of a human pregnancy is 269 days. If​ 95% of all human pregnancies last between 249 and 289 ​days, w

hat is the standard deviation of the distribution of lengths of human​ pregnancies? What percent of human pregnancies are expected to last at least 287 ​days?
Mathematics
1 answer:
o-na [289]3 years ago
7 0

Answer:93% not sure

Step-by-step explanation:

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Please help! I'm so confused on this. Ill give brainliest if you can figure these out.
Verizon [17]

Answer:

12) just plug in the numbers to the equation

C = (-4,5)   D = (-2,3)

11) 8.426

10) 3, 4, 5

level 3-4) 24

Step-by-step explanation:

11) 7^2 + 11^2 = c^2

   49 + 22 = c^2

    √71 = √c^2

    c = 8.426

10) 3, 4, 5 is a special right triangle but

3^2 + 4^2 = 5^2

25 = 25

level 3-4)

7^2 + h^2 = 25^2

49 + h^2 = 625

√h^2 = √576

h = 24

8 0
2 years ago
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A sphere has a diameter of 8cm. Which statements about the sphere are true? Check all that apply.
melomori [17]

Answer:

1424

Step-by-step explanation:

8 0
3 years ago
What is greater 0.9 or 95%
Alex17521 [72]
0.9 = 90%
so 95% is larger

Alternatively, you can convert 95% to decimal form to get 0.95
Then compare 0.90 to 0.95 to see that 0.95 is larger
8 0
4 years ago
a repairman charges an inspection fee plus 20 per hour. A customer with a coupon for 30% off the inspection fee pays $95 for a 3
charle [14.2K]

Answer:

$108.50 for the 30% off and 1h 35min without the coupon

Step-by-step explanation: 60+95=155

155x0.30=46.5

155-46.5=108.50


5 0
3 years ago
Read 2 more answers
I
valkas [14]

Answer: Y = 3/4x + 3

Step-by-step explanation:

If two lines are perpendicular, then the product of the two slopes should be -1.

First change 4x + 3y = 7 to Slope intercept form

  (4x - 4x) + 3y = 7 - 4x

   3y/3 = 7/3 - 4/3x

    Y = -4/3x + 7/3 ( -4/3 is the slope)

  Then find the slope of line n

     -4/3 x S = -1

      (-3/4 x -4/3) x S = -1 x -3/4

       S = 3/4

    Slope of line n is 3/4

      Next find the Y-intercept of line n

     Since line n contains (2,3) we can use 3 as the y-intercept of line n

          Hence, the equation of line n is Y = 3/4x + 3

7 0
2 years ago
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