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Digiron [165]
2 years ago
7

Solve for x round to the nearest tenth if necessary

Mathematics
1 answer:
mash [69]2 years ago
7 0

tan 39 = x /30

0.809 = x/30

x = 24.29

x = 24.3

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Let X denote the time in minutes (rounded to the nearest half minute) for a blood sample to be taken. The probability mass funct
Basile [38]

This question is incomplete, the complete question is;

Let X denote the time in minutes (rounded to the nearest half minute) for a blood sample to be taken. The probability mass function for X is:

x     0       0.5       1       1.5       2       2.5

f(x)  0.1     0.2     0.3    0.2     0.1       0.1

determine;

a) P( X < 2.5 )

B) P( 0.75 < X ≤ 1.5 )

Answer:

a) P( X < 2.5 ) = 0.9

b) P( 0.75 < X ≤ 1.5 ) = 0.5

Step-by-step explanation:

Given the data in the question;

The probability mass function for X is:

x     0       0.5       1       1.5       2       2.5

f(x)  0.1     0.2     0.3    0.2     0.1       0.1

a) P( X < 2.5 )

P( X < 2.5 ) = p[ x = 0 ] + p[ x = 0.5 ] + p[ x = 1 ] + p[ x = 1.5 ] + p[ x = 2 ]

so

P( X < 2.5 ) = 0.1 + 0.2 + 0.3 + 0.2 + 0.1

P( X < 2.5 ) = 0.9

b) P( 0.75 < X ≤ 1.5 )

P( 0.75 < X ≤ 1.5 ) = p[ x = 1 ] + p[ x = 1.5 ]

so

P( 0.75 < X ≤ 1.5 ) = 0.3 + 0.2

P( 0.75 < X ≤ 1.5 ) = 0.5

3 0
3 years ago
Solve for r<br> rs / a - 3 = k
Jobisdone [24]
You can isolate r to one side of the equation by dividing by adding three, dividing by s, multiplying by a and you get:

r=a(3+k)/s
6 0
3 years ago
rita bought 5 pairs of sock.each pair cost $ 4.how much did rita spend on socks.explain how you know​
Alla [95]
Rita spent 20$. By multiplying 5 pairs with 4$ we can see that it will equal 20$
8 0
2 years ago
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AlekseyPX
x^2+12x+43=0&#10; 

x= \dfrac{-b+ \sqrt{b^2-4ac} }{2a}, \dfrac{-b- \sqrt{b^2-4ac} }{2a} 

x= \dfrac{-12+ \sqrt{12^2-4*43} }{2},\dfrac{-12- \sqrt{12^2-4*43} }{2} 

x= \dfrac{-12+2 \sqrt{7i} }{2}, \dfrac{-12-2 \sqrt{7i} }{2} 

x=-6+ \sqrt{7i},-6- \sqrt{7i}
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I need help with this question
snow_tiger [21]

To solve this, subtract 6 from both sides of the greater than sign to get..

x is greater than -4

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