1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
torisob [31]
2 years ago
5

The net of a pyramid is shown below.

Mathematics
1 answer:
sveticcg [70]2 years ago
8 0

Answer:

80 in^2

Step-by-step explanation:

8*4=32

32/2=16

16= One triangle

16*4 triangles=64

4*4=16

64+16=80

You might be interested in
ali wants to buy a piano the piano measures 19/4 feet long she has a space 5 feet long for the paino in her house. does she have
IceJOKER [234]
Yes. This is because 19/4 as a mixed number is 4 3/4. 4 3/4 < 5. It might be a tight fit but she has enough room

Please vote the brainliest!
8 0
2 years ago
A standard weight known to weigh 10 grams. Some suspect bias in weights due to manufacturing process. To assess the accuracy of
notsponge [240]

Answer:

a) The 98% confidence interval for the mean weight is between 10.00409 grams and 10.00471 grams

b) 49 measurements are needed.

Step-by-step explanation:

Question a:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.98}{2} = 0.01

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.01 = 0.99, so Z = 2.327.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.327\frac{0.0003}{\sqrt{5}} = 0.00031

The lower end of the interval is the sample mean subtracted by M. So it is 10.0044 - 0.00031 = 10.00409 grams

The upper end of the interval is the sample mean added to M. So it is 10 + 0.00031 = 10.00471 grams

The 98% confidence interval for the mean weight is between 10.00409 grams and 10.00471 grams.

(b) How many measurements must be averaged to get a margin of error of +/- 0.0001 with 98% confidence?

We have to find n for which M = 0.0001. So

M = z\frac{\sigma}{\sqrt{n}}

0.0001 = 2.327\frac{0.0003}{\sqrt{n}}

0.0001\sqrt{n} = 2.327*0.0003

\sqrt{n} = \frac{2.327*0.0003}{0.0001}

(\sqrt{n})^2 = (\frac{2.327*0.0003}{0.0001})^2

n = 48.73

Rounding up

49 measurements are needed.

7 0
2 years ago
The cost of a gallon of gas increased from $3.54 to $3.87 over the weekend. What is the percent increase for the cost of gas, ro
Dmitrij [34]

Answer:

9%

Step-by-step explanation:

percent increase is calculated as

\frac{increase}{original} × 100%

increase = $3.87 - $3.54 = $0.33 , then

% increase = \frac{0.33}{3.54} × 100% ≈ 9% ( to the nearest whole percent )

5 0
1 year ago
Read 2 more answers
In the outsiders Johnny kills a soc.
Nezavi [6.7K]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What is 231 divided by 42
luda_lava [24]
5.5 is the answer for the problem
6 0
3 years ago
Read 2 more answers
Other questions:
  • 14.30 6 3/4 sales tax
    11·1 answer
  • Which is true?
    6·1 answer
  • Problem page a garden table and a bench cost $990 combined. the garden table costs $90 more than the bench. what is the cost of
    13·1 answer
  • Which answer is the same as moving the decimal in 5.3 two places to the left?
    13·1 answer
  • Divide 3765 by 8 and write the remainder as a fraction
    5·2 answers
  • Given f(x) = –2x + 2, find f(6).
    12·2 answers
  • Help please ahhahahahgbdhwdgwadghw
    9·1 answer
  • A company makes windows for use in homes and commercial buildings. The standards for glass thickness call for the glass to avera
    7·1 answer
  • 9.476, 9.427, 9.43, 9.347, 9.4, 9.38<br><br> HELP ASAP<br><br><br> LESSER GREATER
    7·1 answer
  • Whats x^2=1? I dunno it
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!