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Ratling [72]
3 years ago
10

Please help me I really need it​

Mathematics
2 answers:
jeyben [28]3 years ago
7 0

Answer:

15 grams .

Step-by-step explanation:

We need to multiply the percentage as a decimal (0.30) with the amount of chocolate (50 g):

0.30*50 = 15 g

There are 15 grams of cocoa in the chocolate bar.  

notka56 [123]3 years ago
6 0
<h3>Answer:  15 grams of cocoa</h3>

Work Shown:

30% = 30/100 = 0.30

30% of 50 = 0.30*50 = 15

Here's another way to think about it: If we had 100 grams of chocolate and 30% are cocoa, then we have 30 grams of cocoa by definition of what percentage means. Divide the 100 in half to get 50, so we'll have to divide the 30 in half to get 15.

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The function c= 1.50(n-2) +5.50 represents the costs c in dollars of printing n invitation. Which of the following is not true
ratelena [41]
For this case we have the following equation:
 
 Where,
 n: number of invitations:
 c: cost in dollars
 We note that the slope of the line for this case is:
 
 The slope represents the cost of printing each of the invitations.
 Therefore, it is false that the cost of printing each invitation is $ 5.50
 Answer:
 the following is not true:
 A) each invitation costs $ 5.50 to print.

I hope this helped you! Good luck!
7 0
3 years ago
The weekly salaries of sociologists in the United States are normally distributed and have a known population standard deviation
Lostsunrise [7]

Answer:

ME =z_{\alpha/2} \frac{\sigma}{\sqrt{n}}

The confidence level is 0.98 and the significance is \alpha=1-0.98 =0.02 and \alpha/2 =0.01 and the critical value using the table is:

z_{\alpha/2}= 2.326

And replacing we got:

ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76

Step-by-step explanation:

For this case we have the following info given:

\sigma = 425 represent the population deviation

n =22 the sample size

\bar X =1520 represent the sample mean

We want to find the margin of error for the confidence interval for the population mean and we know that is given by:

ME =z_{\alpha/2} \frac{\sigma}{\sqrt{n}}

The confidence level is 0.98 and the significance is \alpha=1-0.98 =0.02 and \alpha/2 =0.01 and the critical value using the table is:

z_{\alpha/2}= 2.326

And replacing we got:

ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76

3 0
3 years ago
Plsss !! help me i need to find the area as a sum and area as a product. I need the steps
dybincka [34]

Step-by-step explanation:

=3x (2x+7)+2(2x+7)

=6x2+21x+4x+14

6x2+25x +14

7 0
2 years ago
A company that manufactures small canoes has a fixed cost of $24,000. It costs $100 to prod canoes produced and sold.) a. Write
sweet-ann [11.9K]

Answer:

a. C(x) = 24,000 + 100x

b. R(x) = 200x

c. Break-even point is 240 canoes

Step-by-step explanation:

a. Cost function is C(x) = FC + pcost * x

C(x) = 24,000 + 100x

Where  

FC=Fixed cost  = 24,000

pcost=costs  to prod canoes = $100

x=produce quantity

b.Revenue function

R(x) = Px * x

R(x) = 200x

Where  

Px=Price

x=produce quantity

c. Break-even point is the amount of canoes where revenue are the same as cost.  We cover the total cost with the sales.

So,  FC + pcost * x=Px * x

24,000 + 100x=200x

Isolating x

24,000 =200x- 100x

100x=24000

x=24,000/100

x=240

3 0
3 years ago
Helppppp plsss!!!!!!!!!!!
bagirrra123 [75]

Answer:

22 inch is the diameter because d =2r

8 0
3 years ago
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