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4 years ago

Can someone help with questions 6-7? For question 6, (A,B,C and D). Or can someone help with at least some?

Mathematics

1 answer:

stiks02 [169]4 years ago

6 0

6A. 100.3
B. 103,500,000
C. Lower
D. Longer wavelength
E. Lower energy because longer wavelength
7. Longer wavelength meaning shorter frequency

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Domain: x>0
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3 years ago

The proportion of junior executives leaving large manufacturing companies within three years is to be estimated within 3 percent

Leona [35]

Answer: 709

Step-by-step explanation:

The formulas we use to find the required sample size :-

1. $n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where $\sigma$ = population standard deviation,

E = Margin of error .

z* = Critical value

2. $n=p(1-p)(\dfrac{z^*}{E})^2$ , where p= prior estimate of population proportion.

3. If prior estimate of population proportion is unavailable , then we take p= 0.5 and the formula becomes

$n=0.25(\dfrac{z^*}{E})^2$

Given : Margin of error : E= 3% =0.03

Critical value for 95% confidence interval = z*= 1.96

A study conducted several years ago revealed that the percent of junior executives leaving within three years was 21%.

i.e. p=0.21

Then by formula 2., the required sample size will be :

$n=0.21(1-0.21)(\dfrac{1.96}{0.03})^2$

$n=0.21(0.79)(65.3333)^2$

$n=(0.1659)(4268.44008889)\\\\ n=708.134933333\approx709$ [Round to the next integer.]

Hence, the required sample size of junior executives should be studied = 709

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4 years ago

Suppose that a dimension x and the area A of a shape are differentiable functions of t. Write an equation that relates to .

marusya05 [52]

Complete question is;

Suppose that a dimension x and the area A = 2x² of a shape are differentiable functions of t. Write an equation that relates dA/dt to dx/dt.

Answer:

Step-by-step explanation:

Since A = 2x²

Let's differentiate both sides with respect to x.

dA/dx = 4x

Now, we want to find the relationship between dA/dt and dx/dt

dA/dt can be expressed as;

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Thus;

dA/dt = 4x(dx/dt)

Thus, the equation that relates dA/dt to dx/dt is;

dA/dt = 4x(dx/dt)

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3 years ago

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melomori [17]

Answer:

I'm guessing 3 or 2

Step-by-step explanation:

3 or 2 because you can't have 2 and I would equal 8 which would also equal 3x +2y

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4 years ago

The checkbook balance of Roger Co. Is $982.50. The bank statement reveals a balance of $1,051.82. The bank statement showed inte

Lubov Fominskaja [6]

the balance would be 1,285.32 iam not completely sure

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3 years ago

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