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3 years ago

We are looking at HIV positive rates among rural Chinese farmers. One of the variables studied

Mathematics

1 answer:

seraphim [82]3 years ago

4 0

Answer:

Categorical data.

Step-by-step explanation:

Variables can be classified as:

Quantitative: If the variable assumes numeric values.

Categorical: If the variable assumes labels.

In this question:

'illiterate," "primary," and "secondary" are labels, which means that in this example, education level is an example of categorical data.

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Use linear approximation to approximate √25.3 as follows.

Sophie [7]

The idea is to use the tangent line to $f(x)=\sqrt x$ at $x=25$ in order to approximate $f(25.3)=\sqrt{25.3}$ .

We have

$f(x)=\sqrt x\implies f(25)=\sqrt{25}=5$

$f'(x)=\dfrac1{2\sqrt x}\implies f'(25)=\dfrac1{10}$

so the linear approximation to $f(x)$ is

$L(x)=f(5)+f'(5)(x-5)=5+\dfrac{x-5}{10}=\dfrac x{10}+\dfrac92$

Hence $m=\frac1{10}$ and $b=\frac92$ .

Then

$f(25.3)\approx L(25.3)=\dfrac{25.3}{10}+\dfrac92=\boxed{7.03}$

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3 years ago

Which graph represents a quadratic function with a vertex at (0, 0)?

maxonik [38]

The 3rd one. (where the round part of the graph is at 0, 0) because that is where the y axis meets

7 0

3 years ago

Read 2 more answers

$300 invested at 12% compounded monthly after a period of 1.5 years

GalinKa [24]

Answer: $358.8 to the nearest tenth

Step-by-step explanation:

Compound interest is calculated by Where: A = P(1 + r)t

Where P= 300, r= 12% = 0.12, t= 1.5 years

Slot in the figures

300 (1 + 0.12) 1.5

300 (1.12) 1.5

300x 1.12

336e1.12

A = $ 358.84

4 0

3 years ago

John worked 43 hours last week. His hourly rate is $9.00. He has the following deductions taken from his pay: Social Security ta

disa [49]

Assuming John does not get premium pay for hours over 40, his pay will be ...

... 43 hours × $9.00 = $387

... - 6.2% × $387 = $23.99

... - 1.45% × $387 = $5.61

... - $15.00

... - 5% × $387 = $19.35

... - 10% × ($387 -19.35) = $36.77

... = $286.28 . . . . net pay after all the deductions

6 0

4 years ago

Read 2 more answers

A smoke jumper jumps from a plane that is 1700 ft above the ground. The function y = -16t2 + 1700 gives the jumper's height y in

lakkis [162]

Answer: (A) 6.6 sec (B) 6.89 sec

Step-by-step explanation:

y = -16t² + 1700

1000 = -16t² + 1700

-1700 -1700

-700 = -16t²

÷-16 ÷-16

43.75 = t²

√43.75 = √t²

6.6 = t

***********************************

y = -16t² + 1700

940 = -16t² + 1700

-1700 -1700

-760 = -16t²

÷-16 ÷-16

47.5 = t²

√47.5 = √t²

6.89 = t

4 0

3 years ago