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2 years ago

What does the law of supply state?

Mathematics

1 answer:

Juliette [100K]2 years ago

8 0

I think the answer is B

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Joy bought pens at $ 120 a dozen. He sold it for $15 each. What is his profit percent?

Mazyrski [523]

Answer:

50%

Step-by-step explanation:

He sold it for Rs 15 each. What is his profit percent? CP of 1 pen = 120/12= 10 SP of 1 pen = 15 Profit = 5 P % = (p/CP)*100=(5/10) x 100 = 50%.

3 0

2 years ago

What is the expression after applying the distributive property? −3.1(−9+(−7))

s344n2d4d5 [400]

-31 because if you do p.e.m.d .a .s

7 0

2 years ago

The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we want to be 95% confident th

Aleks04 [339]

Answer:

The minimum sample size that can be taken is of 14 dogs.

Step-by-step explanation:

The formula for calculating the minimum sample size to estimate a population mean is given by:

$n=\frac{z^{2}\sigma^{2}}{e^{2}}$

The first step is obtaining the values we're going to use to replace in the formula.

Since we want to be 95% confident, $1-\alpha=0.95 \Rightarrow \alpha=0.05$ .

Therefore we look for the critical value $z_{\alpha/2}=1.96$ .

Then we calculate the variance:

$\sigma = 3.7 \Rightarrow \sigma^{2}=13.69$

And we have that:

$e=2 \Rightarrow e^{2}=4$

Now we replace in the formula with the values we've just obtained:

$n=\frac{1.96^{2}*13.69}{4}=13.1479\approx 14$

Therefore the minimum sample size that can be taken to guarantee that the sample mean is within 2 inches of the population mean is of 14 dogs.

6 0

2 years ago

Solve the proportion h/4=7/14

BabaBlast [244]

H/4=7/14
we cross multiply , so
14*h = 7*4
14h=28
divide by 14 on both sides
h=28/2=2

4 0

2 years ago

Can someone please help me I can’t figure this out!!

mixas84 [53]

1. Declarative
2. Interrogative
3. Imperative
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6. Exclamatory
7. Declarative
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6 0

3 years ago