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Anna35 [415]
3 years ago
13

Please give a real answer. What is the surface area of this composite figure?

Mathematics
1 answer:
dusya [7]3 years ago
3 0

Answer:

<h2>           268 cm²</h2>

Step-by-step explanation:

<h2>10\cdot7+7\cdot8+2\cdot(\frac12\cdot8\cdot6)+2\cdot(2\cdot6)+2\cdot(2\cdot7)+6\cdot7=\\\\=70+56+48+24+28+42=268</h2>
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Original price of a sofa: $620.00<br> Discount: 25%, Selling Price?
Aleks [24]

Answer:

x=155

Step-by-step explanation:

I hope the pictures are clear and you get the concept!

3 0
3 years ago
The length of human pregnancies from conception to birth follows a distribution with mean 266 days and standard deviation 15 day
Katena32 [7]

Answer:

a) 81.5%

b) 95%

c) 75%

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 266 days

Standard Deviation, σ = 15 days

We are given that the distribution of  length of human pregnancies is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

a) P(between 236 and 281 days)

P(236 \leq x \leq 281)\\\\= P(\displaystyle\frac{236 - 266}{15} \leq z \leq \displaystyle\frac{281-266}{15})\\\\= P(-2 \leq z \leq 1)\\\\= P(z \leq 1) - P(z < -2)\\= 0.838 - 0.023 = 0.815 = 81.5\%

b) a) P(last between 236 and 296)

P(236 \leq x \leq 281)\\\\= P(\displaystyle\frac{236 - 266}{15} \leq z \leq \displaystyle\frac{296-266}{15})\\\\= P(-2 \leq z \leq 2)\\\\= P(z \leq 2) - P(z < -2)\\= 0.973 - 0.023 = 0.95 = 95\%

c) If the data is not normally distributed.

Then, according to Chebyshev's theorem, at least 1-\dfrac{1}{k^2}  data lies within k standard deviation of mean.

For k = 2

1-\dfrac{1}{(2)^2} = 75\%

Atleast 75% of data lies within two standard deviation for a non normal data.

Thus, atleast 75% of pregnancies last between 236 and 296 days approximately.

7 0
3 years ago
Kate wants to buy a scarf for $22. How much will the scarf cost if she buys it in Coconut Grove?
Sonja [21]
Elaborate more on your question! Include details that we don't know.
5 0
3 years ago
Christopher spends a total of $235.94. He
cluponka [151]

Answer:

He bought 6 sweaters

Step-by-step explanation:

235.94-80.00=155.94

155.94/25.99=6

6 0
3 years ago
QUICK!!<br><br> Which equation represents the relationship shown in the graph??
Dmitriy789 [7]

Answer:

y=1/2x

Step-by-step explanation:

Look at the graph, all you need is the first point.

Y is at 4 and X is at 2. We can divide y/x to get 4/2=1/2x

3 0
2 years ago
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