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Dmitry_Shevchenko [17]
3 years ago
15

Given:

Mathematics
2 answers:
vichka [17]3 years ago
7 0

Answer:

answer is

[12  -4  -2]

[-8  -13  8]

[8  15  18]

Step-by-step explanation:

got it right on e2020

ElenaW [278]3 years ago
5 0

Answer:

[ 13 -1 -71

-6 1 19]

Step-by-step explanation:

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alex needs to buy compressed air to fill 5 empty cylindrical tanks for his store. each tank is 12 feet deep and has a radius of
Yanka [14]
Volume of a cylinder = the area of the base x height of the cylinder
Area of base = \pir^2
A = 6^2(\pi)
A = 36\pi
V = 36\pi x 12
V = 432\pi

5 cylinders = 5V

5V = 5 x (432\pi)
5V = 2160\pi

Final answer: Alex needs to buy 2160\pi or 6785.84 cubic feet worth of compressed air to fill all of the cylindrical tanks.
4 0
3 years ago
how many gallons of a 80% antifreeze solution must be mixed with 70 gallons of 30% antifreeze to get a mixture that is 70% antif
Fynjy0 [20]
Let x=gallons of 80% solution to be mixed
x+80=gallons go final 70% mixture
..
80%*x+30%*80=70%*(x+80)
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x=320
gallons of 80% solution to be mixed=320
3 0
3 years ago
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. Find the pro
Bogdan [553]

Answer:

Step-by-step explanation:

Let X be the length of pregnancy.

X is N(268, 15)

a) Prob of pregnancy lasting 307 days or longer

= P(X>307) = P(Z>\frac{307-268}{15} )\\=P(Z>2.6)\\

=0.5-0.4953

=0.0047

b) Lowest 2% is 2nd percentile

Z=-2.55

X score = 268-2.55(15)

= 229.75 days

If length of days >230 days then it is not premature.

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3 years ago
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Elis [28]

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Prime. Prime numbers can only be divided by the whole number, or one.

6 0
2 years ago
Which number is less than 8/3​
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A I belive

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Just divide the top number with the bottom

4 0
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