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
Doss [256]
2 years ago
12

Find the area of an equilateral triangle with apothem 7 cm. Round to the nearest whole number.

Mathematics
1 answer:
Burka [1]2 years ago
5 0
The answer is 255cm<span>²</span>
You might be interested in
HELPPP MY HW IS DUE IN 5 MINUTES. WHATS 2 PLUS 2. PLZZZ ANSWER QUICKKKK
svp [43]

Answer: 4

Step-by-step explanation: 2+2 is 4

8 0
3 years ago
Read 2 more answers
Two cars start at a given point and travel in the same direction at average speeds of 45 miles per hour and 52 miles per hour (s
Citrus2011 [14]

Answer:

half apart

Step-by-step explanation:

hope it help you

7 0
3 years ago
An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had
Stolb23 [73]

Answer:

Q1 z(s) is in the rejection region for H₀ ; we reject H₀. We can´t support the that means have no difference

Q2  CI 95 %  =  (  0,056 ;  0,164 )

Step-by-step explanation:

Sample information for people under 18

n₁  =  500

x₁ =  180

p₁  =  180/ 500    p₁  =  0,36    then  q₁  =  1 -  p₁     q₁ =  0,64

Sample information for people over 18

n₂  =  600

x₂  =  150

p₂  =  150 / 600   p₂ =  0,25   then   q₂  =  1 - p₂   q₂ =  1 - 0,25   q₂ = 0,75

Hypothesis Test

Null hypothesis                        H₀              p₁  =  p₂

Alternative Hypothesis           Hₐ              p₁  ≠  p₂

The alternative hypothesis indicates that the test is a two-tail test.

We will use the approximation to normal distribution of the binomial distribution according to the sizes of both samples.

Testin at CI =  95 %    significance level is  α = 5 %   α  =  0,05  and

α/ 2  =  0,025   z (c) for that α  is from z-table:

z(c) = 1,96

To calculate   z(s)

z(s)  =  ( p₁  -   p₂ ) / EED

EED = √(p₁*q₁)n₁  +  (p₂*q₂)/n₂

EED = √( 0,36*0.64)/500  +  (0,25*0,75)/600

EED = √0,00046  +  0,0003125

EED = 0,028

( p₁  -  p₂  )  =  0,36  -  0,25  = 0,11

Then

z(s)  =  0,11 / 0,028

z(s) = 3,93

Comparing  z(s) and  z (c)    z(s) > z(c)

z(s) is in the rejection region for H₀ ; we reject H₀. We can´t support the idea of equals means

Q2  CI  95 %   =  (  p₁  -  p₂  ) ±  z(c) * EED

CI 95%  =  ( 0,11   ±  1,96 * 0,028 )

CI 95%  = (  0,11  ±  0,054 )

CI 95 %  =  (  0,056 ;  0,164 )

8 0
2 years ago
If f(x) = 3x - 12, what is f(2)?
LUCKY_DIMON [66]
Answer is D
3(2)-12
6-12
F(2):-6
3 0
3 years ago
Read 2 more answers
In 2010 the population of Brazil was about 1.907×10 to the 8 power. The population of Mexico is about 1.123×10 to the 8 power. A
Romashka [77]

Brazil population: 1.907×10^{8}

Mexico population 1.123×10^{8}

To find how much more the population was in Brazil than in mexico, you would subtract the Brazil population to Mexico's population:

The 10^{8}'s would not cancel out because they are representing further decimal places that aren't written, so you would subtract 1.907 and 1.123.

1.907 - 1.123= 0.78410^{8}

Brazil's population is 0.784×10^{8} larger than Mexico.

6 0
3 years ago
Other questions:
  • Mrs Moore’s and Mrs. Ruiz’s classes are competing for the best scores on their math test. Use the box plots below to answer ques
    14·2 answers
  • At a farmers' market Saturday, 5/8 of the vegetables sold were green. Of these, 3/4 were string beans. What fraction of the vege
    9·1 answer
  • The ratio of the length to the width of a map is 5 to 2. The map is exactly 15 inches in length. What is the width of the map
    15·2 answers
  • Rayshaw is applying mulch...<br> Plz answer 4 and 5
    9·1 answer
  • What is the value of k?<br> k=
    14·1 answer
  • Danny has 48 baseball cards in his collection. He would like to give 3/4 of them to his little brother. How many should he give
    10·1 answer
  • -3 - square root of-12 divided by 24​
    12·1 answer
  • numa prova de múltipla escolha com 30 questões, o aluno ganha 3 pontos por cada questão que acerta, mas perde 2 pontos por cada
    13·1 answer
  • Thanks, to everyone asking questions and giving answers. I finished my adult diploma today and a lot of it came from all of your
    10·2 answers
  • Simplify the inequality​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!