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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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A car rental company charges $34 per day for a rented car and $0.50 for every mile driven. A second rental company charges $20 p
Dahasolnce [82]

Answer:

A

Step-by-step explanation:

If you multiply the price for each mule x the amount of miles + the daily rental, you get the price. If you do this for each option and each car rental then you can see when the answers add up.

.75x56+20=62

.50x56+34=62

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4 years ago
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In each problem, angle C is a right angle. Solve each triangle rounding answers to the nearest
ryzh [129]

Answer:

B = 61°

A = 29°

a = 10

Step-by-step explanation:

We are given;

c = 16, b = 14​

Since we are told that C is a right angle, it means that C = 90°

Thus using sine rule, we have;

c/sin C = b/sin B

16/sin 90 = 14/sin B

16/1 = 14/sin B

sin B = 14/16

sin B = 0.875

B = sin^(-1) 0.875

B ≈ 61°

Now, since C is a right angle, it means that c will be the hypotenuse of the triangle.

Thus, from pythagoras theorem, If the other side of the triangle is a, then;

a² + b² = c²

a² + 14² = 16²

a² = 16² - 14²

a² = 256 - 156

a² = 100

a = √100

a = 10

Since we know B and C, we can find A because sum of angles in a triangle is 180°.

Thus;

A = 180 - (B + C)

A = 180 - (61 + 90)

A = 29°

4 0
3 years ago
THis is kinda hard, pls help ASAP
Feliz [49]

Answer:

yep this kinda hard!!!!!!!!!!!!?!??!

7 0
3 years ago
Find the equation that passes through points A and B
Irina18 [472]

Answer:

Step-by-step explanation:

A(1,7); B(-3,-1); slope m =(-1-7)/-3-1) = -8/-4 = 2

Equation of a line AB is

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y - 7 = 2(x-1)

y - 7 = 2x-2

y = 2x + 5

3 0
3 years ago
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a cheetah reaches a speed of 30 m/s as it chases its prey. What is the kinetic energy of the cheetah?
ZanzabumX [31]
Kinetic energy is in movement, so the answer is obviously the cheetah running :)
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3 years ago
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