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
natulia [17]
3 years ago
8

An equilateral triangle has a side length of 16 cm work out the area of the triangle.

Mathematics
2 answers:
bonufazy [111]3 years ago
4 0

Answer:

128cm²

Step-by-step explanation:

A=½×b×h

A=½×16cm×16cm

A=½×256cm²

A=128cm²

uysha [10]3 years ago
4 0

Answer:

110.9 cm²

Step-by-step explanation:

The area (A) of an equilateral triangle is calculated as

A = \frac{s^2\sqrt{3} }{4}  ( s is the side length )

Here s = 16, thus

A = \frac{16^2\sqrt{3} }{4}

   = \frac{256\sqrt{3} }{4} = 64\sqrt{3} ≈ 110.9 cm² ( to 1 dec. place )

You might be interested in
The average annual cost of the first year of owning and caring for a large dog is $1,843 (US News and World Report, September 9,
ICE Princess25 [194]

Answer:

a. Error is 0.14

b. between 1913.68 to 1772.32

Step-by-step explanation:

Requirement a)

The margin of error is a statistic expressing the amount of random sampling error in a survey's results.

Given,

Size of the sample n = 50

We know, At 95% confidence interval,

The margin of error,

= 0.98/√n  

= 0.98/√50

= 0.98/7.07

= 0.13859 ~ 0.14

So the margin of error at 95% confidence level is 0.14.

Requirement b)

Given,

Standard deviation σ = 255

Population mean z = 1814

Size of the sample n = 50

We know, At 95% confidence interval,

(z-µ)/(σ/√n)  < Z_0.05

= - Z_0.05 < (z-µ)/(σ/√n) < Z_0.05

= - 1.96 * σ/√n < (z-µ)/(σ/√n)*  σ/√n  < 1.96 * σ/√n  [ in two tail Z test the value of Z_0.05 is 1.96 ]

= - 1.96 * 255/√50 < Z-µ <  1.96 * 255/√50

= -70.6828 < Z-µ < 70.6828

= 70.6828 > µ - Z > -70.6828

= 70.6828 + Z > µ > -70.6828 + Z

= 70.6828 + 1814 > µ > -70.6828 + 1814

=1913.68 > µ > 1772.32

So, the sample mean would be between 1913.68 to 1772.32.

7 0
3 years ago
Which equation would you use to solve the problem," Four less than the product of 3 and a number is 15"
geniusboy [140]
The answer is a. 3n - 4 = 15
5 0
3 years ago
Read 2 more answers
Can someone please answer this question please answer it correctly and please show work please help me I need it
Oksana_A [137]

Answer:

C

Step-by-step explanation:

Question: 10 - 8 = 2

A = (-18)

B = 18

C = 2

D = (-2)

6 0
3 years ago
Read 2 more answers
QUICK - 70 POINTS! GEOMETRY HOMEWORK
sukhopar [10]

a/c = d/a

you would cross multiply to get aa = cd

aa = a^2

so you would have a^2 = cd

6 0
3 years ago
Read 2 more answers
A pickup truck carrying 10 to the 3rd power identical bricks weighs 6,755 pounds. If the empty truck weighs 6,240 pounds, what i
Aleks04 [339]

Answer:

The answer is that each brick weights .515 pounds.

Step-by-step explanation:

10 to the 3rd power is 10^3 = 1000 bricks.

The weight of the full truck minus the weight of the empty truck is the weight of the bricks:

6755 - 6240 = 515 pounds of bricks

Pounds per brick:

515 / 1000 = .515 pounds per brick.

Hope this helps! Have a great day!

5 0
3 years ago
Other questions:
  • Solve for n.<br><br> -2=4+n<br> help???
    10·2 answers
  • Translate the following argument in a standard form categorial syllogims then use venn diagram or rules for syllogim to determin
    15·1 answer
  • Cole paid $24 for two calculators and one pack of pens. Kai paid $45 for three calculators and two packs of pens. Cole and Kai b
    15·1 answer
  • Mindy is 39 years old. Mindy's age is 3 years older than two times Jake's age. How old is Jake?
    7·2 answers
  • Kara buys 24 bagels. Ten are whole wheat. What fraction of the bagels are wheat? Write in simplest form.
    6·2 answers
  • Who uses iPhone x silver for editing on vs or am I the only one._.
    11·2 answers
  • Char bought a TV for $1,345.36, including tax. She made a down payment of $250 and paid the balance in six equal monthly payment
    14·1 answer
  • Kimberly bought a pair of earrings on sale for 55 cent she paid it using 3 quarters How much change should she get back?
    11·1 answer
  • Kylie wants to add 10 to 167. She thinks that the 6 represents the number of tens and thats by adding a 10 there are a total of
    8·1 answer
  • The library is to be given 7 books as a gift. The books will be selected from a list of 15 titles. If each book selected must ha
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!