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VMariaS [17]
3 years ago
15

Can someone please tell me the answers to the last two questions please

Mathematics
2 answers:
Sergeu [11.5K]3 years ago
6 0
Are you supposed to estimate or get an exact answer? If you're estimating you can see if the number is close to any perfect squares. In this case 63 is very close to 64, and 48 is very close to 49. The answers can then be estimated to be approximately 8 and 7, respectively.
Veronika [31]3 years ago
3 0
Sqrt(63)=sqrt(9)*sqrt(7)=3sqrt(7)

3 times the square root of 7

sqrt(48)=sqrt(16)*sqrt(3)=4sqrt(3)

4 times the square root of 3
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The probability density function of the time it takes a hematology cell counter to complete a test on a blood sample is f(x)=0.0
uysha [10]

Answer:

a) 20%

b) 40%

c) Mean = 62.5 seconds; Variance = 52.083 seconds

Step-by-step explanation:

The time it takes a hematology cell counter to complete a test on a blood sample is continuously distributed over the period of 50 to 75 seconds with probability f(x) = 0.04.

a) The percentage of tests require more than 70 seconds is:

P(X>70) = 1- \frac{70-50}{75-50} \\P(X>70) =0.2 = 20\%

b)The percentage of tests that require less than one minute (60 seconds) is:

P(X70) =0.4 = 40\%

c) The mean and variance of a continuous distribution are determined by:

M=\frac{A+B}{2}=\frac{50+75}{2}\\ M= 62.5\ seconds\\\\V=\frac{(B-A)^2}{12}=\frac{(75-50)^2}{12}\\  V= 52.083\ seconds

Mean = 62.5 seconds.

Variance = 52.083 seconds.

3 0
3 years ago
What is the radius of 706.5 ft in circle ft
mel-nik [20]
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Otherwise, I o no.
4 0
3 years ago
Please help me. There are 25 students in Mrs. Benatar‘s class at the beginning of the school year, and the average number of sib
adelina 88 [10]

Answer: 3.19

Step-by-step explanation:

So to find the average I used a simple but pretty effective method

3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+8/26=3.1923

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3 years ago
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NikAS [45]

Answer:

Slope form of line  y = 4x +41

Step-by-step explanation:

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The y-intercept of the line that passes through the given point  (-9,5) is

5 = 4(-9) + b

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b=41

The equation of the line that passes through the given point  (-9,5) is

y =mx +b

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2 years ago
The outdoor temperature increases by 3 degrees each hour for 4 hours.
Thepotemich [5.8K]

Answer:

12

Step-by-step explanation:

4hoursx3 temp increase=12

7 0
3 years ago
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