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pantera1 [17]
3 years ago
15

What is the formula for surface area? Giving brainliest to the correct answer

Mathematics
1 answer:
Kitty [74]3 years ago
5 0

Answer: Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area

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Derivada de un producto <br><br> Y=x3-8
liubo4ka [24]

Answer:

x = 8/3

Step-by-step explanation:

y = 0

0 = x3 - 8

......

4 0
4 years ago
A researcher wants to see if birds that build larger nests lay larger eggs. He selects two random samples of nests: one of small
True [87]

Answer:

95% confidence interval for the difference between the average mass of eggs in small and large nest is between a lower limit of 0.81 and an upper limit of 2.39.

Step-by-step explanation:

Confidence interval is given by mean +/- margin of error (E)

Eggs from small nest

Sample size (n1) = 60

Mean = 37.2

Sample variance = 24.7

Eggs from large nest

Sample size (n2) = 159

Mean = 35.6

Sample variance = 39

Pooled variance = [(60-1)24.7 + (159-1)39] ÷ (60+159-2) = 7619.3 ÷ 217 = 35.11

Standard deviation = sqrt(pooled variance) = sqrt(35.11) = 5.93

Difference in mean = 37.2 - 35.6 = 1.6

Degree of freedom = n1+n2 - 2 = 60+159-2 = 217

Confidence level = 95%

Critical value (t) corresponding to 217 degrees of freedom and 95% confidence level is 1.97132

E = t×sd/√(n1+n2) = 1.97132×5.93/√219 = 0.79

Lower limit = mean - E = 1.6 - 0.79 = 0.81

Upper limit = mean + E = 1.6 + 0.79 = 2.39

95% confidence interval for the difference in average mass is (0.81, 2.39)

3 0
3 years ago
5 friends went out for lunch. their total bill was $41.25 , including tax and gratuity. one of them ordered only soda and needed
Akimi4 [234]
First of all you subtract the 2.17 dollars:
41.25-2.17=39.08
Since the other 4 people got the same meal they all have to pay the same amount so you just divide 39.08 by 4:
39.08:4=9.77
4 0
4 years ago
Please help!!!!
faltersainse [42]

Answer:

I don't get the question...

Step-by-step explanation:

Please elaborate more...

Thank you!

3 0
3 years ago
Read 2 more answers
A group of friends wants to go to the amusement park. They have no more than $390 to spend on parking and admission. Parking is
stepladder [879]

Answer:

10 people

Step-by-step explanation:

First, I subtracted $16.75 from $390. I got an answer of $373.25. Next, I divided $373.25 by 34 people. The answer then rounded out to 10 People. So in conclusion 10 people can go to the amusment park.

7 0
3 years ago
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