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Vilka [71]
3 years ago
9

1.A spherical tank has a radius of 6 yards. It is filled with a liquid that costs $7.15 per cubic yard.

Mathematics
2 answers:
slega [8]3 years ago
3 0
1.) 6465.89 cu yards 
2.) (a) <span>255.4 cm
3.) (d) </span><span>275,365 cm³</span>
adoni [48]3 years ago
3 0
1.) 6465.89 cu yards 
2.) (a) <span>255.4 cm
3.) (d) </span><span>275,365 cm³</span>
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A random sample of 121 automobiles traveling on an interstate showed an average speed of 73 mph. from past information, it is kn
tatiyna

121 is big enough to assume normality and not worry about the t distribution. By the 68-95-99.7 rule a 95% confidence interval includes plus or minus two standard deviations. So 95% of the cars will be in the mph range


(73 - 2 \cdot 11, 73 + 2 \cdot 11) = (51,95)


The question is a bit vague, but it seems we're being asked for the 95% confidence interval on the average of 121 cars. The 121 is a hint of course.


The standard deviation of the average is in general the standard deviation of the individual samples divided by the square root of n:


\sigma = \dfrac{ 11}{\sqrt{121}} = 1


So repeating our experiment of taking the average 121 cars over and over, we expect 95% of the averages to be in the mph range


(73 - 2 \cdot 1, 73 + 2 \cdot 1) = (71,75)


That's probably the answer they're looking for.



4 0
3 years ago
La razón delas edades de Paco y Luis es 5/3 y su producto es 240.Calcule la edad del mayor, dentro de 5 años.
tankabanditka [31]

creo que paco es el mayor. lo siento si me equivoco! no soy muy buena en las proporciones

8 0
3 years ago
How much lighter is 345 g than 1,1 kg​
NemiM [27]

Answer:

755 gram lighter

Step-by-step explanation:

Convert 1.1kg into gram by multiplying it with 1000

1.1 x 1000= 1100 and we take this amount and subtract it with 345g

1100-345= 755g

3 0
3 years ago
HURRY  WILL MARK THE BRAINLIEST Al uses the box in the shape of a rectangular prism as shown in the diagram to for his coin coll
Digiron [165]
425 inches, Multiply all the numbers and you get the answer.
7 0
3 years ago
Which of the coordinate pairs below are separated by a horizontal distance of greater than 11 units? Select all that apply.
SpyIntel [72]

9514 1404 393

Answer:

   A, D

Step-by-step explanation:

The horizontal distance between the points is the difference of their x-coordinates.

A) 5.5 -(-6.5) = 12.0 . . . greater than 11

B) 4.7 -(-3.3) = 8.0

C) 11/3 -(-10/3) = 21/3 = 7

D) 2 -(-12) = 14 . . . greater than 11

6 0
3 years ago
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