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
Fynjy0 [20]
3 years ago
7

Please answer quickly. We know from historical records that the Great Pyramid of Giza was originally about 147 meters tall. Assu

ming it was built at its faces at 52 degree inclines, what was the original length of one side of its base? Round your answer to nearest meter.
A. 91 meters
B. 115 meters
C. 181 meters
D. 230 meters
Mathematics
1 answer:
Tasya [4]3 years ago
6 0
X = length of half the base

If you draw out a triangle, the horizontal leg will be x, the vertical leg will be 147 and the angle of inclination (or angle of elevation) is 52 degrees

You'll use tangent to find x

tan(angle) = opposite/adjacent
tan(52) = 147/x
x*tan(52) = 147
x = 147/tan(52)
x = 114.84 ... this is approximate

Half the base is 114.84, so the full base is 2*114.84 = 229.68 which rounds to 230

The final answer is D.
You might be interested in
THIS IS FOR 15 POINTS PLEASE HELP. FIND THE Y INTERCEPT AND SLOPE PLEASE
labwork [276]

Answer:

Slope=1      

Step-by-step explanation:

I don't know the y intercept sorry

3 0
2 years ago
A spinner and 6 cards are shown below:
Tems11 [23]

Answer:

1 over 18

Step-by-step explanation:

The spinner has 3 segments and he spun it 1 time.  So, he has a 1 in 3 chance of landing on green.

There are 6 cards so he has a 1 and 6 chance of picking up the yellow card.    

Multiply those and you have 1 over 18

Done!

3 0
2 years ago
Plss I need answer fast!!
fenix001 [56]

Answer:

C.

Step-by-step explanation:

The equation for the slope of a line is y2-y1/x2-x1, and both triangles have the same slope equation for their hypotenuse.

7 0
2 years ago
Read 2 more answers
A circular tabletop has a diameter of 2.1 m. what is its area​
galben [10]
The answer is A≈3.46m²
8 0
3 years ago
A sample of computer tablet batteries has a mean battery life of 28 months and standard deviation of 4 months. What is the lifes
Ulleksa [173]

Using the Empirical Rule, it is found that the lifespans, in months, are given by:

1. 24 and 32.

2. 20 and 36.

3. 16 and 40.

<h3>What is the Empirical Rule?</h3>

It states that, for a normally distributed random variable:

  • Approximately 68% of the measures are within 1 standard deviation of the mean.
  • Approximately 95% of the measures are within 2 standard deviations of  the mean.
  • Approximately 99.7% of the measures are within 3 standard deviations of the mean.

Hence, considering the mean of 28 months and the standard deviation of 4 months, the life spans are given by:

1. 24 and 32.

2. 20 and 36.

3. 16 and 40.

More can be learned about the Empirical Rule at brainly.com/question/24537145

5 0
2 years ago
Other questions:
  • I am confused in this can someone help?
    12·1 answer
  • The son of three consecutive even integers is 126. let X represent the first integer, X +2 represents the second integer, and X
    6·1 answer
  • Find the zeros of f(x) = (x -3)^2 - 49
    13·1 answer
  • A rectangle has a length of 3x + 7 and a width of 2x - 1. If the perimeter of the rectangle is 42 meters. What is the value of x
    12·1 answer
  • HELP ASAP WILL GIVE 20 POINTSSSSS
    8·1 answer
  • What is the definition of supplementary angles.
    6·2 answers
  • 100+300= What is it<br><br> Help plz
    13·1 answer
  • WILL GIVE BRAINLIEST
    5·1 answer
  • complete the table.tell whether the relationship is a proportional relationship. complete the explanation. A student reads 65 pa
    6·1 answer
  • Simplify the rational expression:<br> x^2+13x+42/x^2+15x+56
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!