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
Roman55 [17]
2 years ago
6

How tall is a building that casts a ​78-ft shadow when the angle of elevation of the sun is 30 degrees​?

Mathematics
1 answer:
Marta_Voda [28]2 years ago
8 0

Answer: 45.03\ ft

Step-by-step explanation:

Given

The length of the shadow is 78 ft

the angle of elevation is \theta =30^{\circ}

Suppose the height of the building is h

From the figure, we can write

\tan 30^{\circ}=\dfrac{h}{78}\\\\h=78\tan 30^{\circ}\\\\h=45.03\ ft

The height of the building is 45.03 ft

You might be interested in
Can you pleaseee help meee
Mrac [35]
Yesssssssss, with what though
6 0
2 years ago
Plsss help me, ASAP, Thank you
ankoles [38]

Answer:

\frac{1}{16}  \frac{10}{9}

Step-by-step explanation:

a reciprocal is a number that when multiplied by a given number gives 1 as  product.

16 * x = 1

x = 1/16

9/10 * x = 1

x = 10/9

8 0
3 years ago
Read 2 more answers
Why is (0,1) y-intercept of the form below?
morpeh [17]
It isn’t because when there is no addition in the equation the y intercept is 0
4 0
3 years ago
An electronics company has developed a new hand held device. The company predicts that the start up cost to manufacture the new
alex41 [277]
Profit = revenue - expenses

expenses : 125,000 + 6.50x
revenue : 9x
so to make a profit, ur revenue (income) has to be higher then ur expenses

revenue > expenses
A. ) 9x > 125,000 + 6.50x
9x - 6.50x > 125,000
2.5x > 125,000
x > 125,000 / 2.5
x > 50,000......so they would have to sell at least 50,001 devices to make a profit <==

B.) the cost of making 1 device is 10% more then the company predicted....10% more then 6.50.....6.50(1.10) = 7.15.....this is the new cost of making 1 device <==

9x > 125,000 + 7.15x ....this is the inequality with the 10% more added
9x - 7.15x > 125,000
1.85x > 125,000
x > 125,000 / 1.85
x > 67,567.5......so to make a profit, they would have to sell at least 67,568 devices to make a profit <==


7 0
3 years ago
Help,again... ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍
coldgirl [10]
144 ounces! There are 8 ounces in 1 cup. 8x18= 144!! :D
3 0
2 years ago
Read 2 more answers
Other questions:
  • Two sides of a triangle are 8 m and 9 m in length and the angle between them is increasing at a rate of 0.06 rad/s. Find the rat
    10·1 answer
  • Find the midpoint of the line joining the points R(2,3)and S(-4,6)
    12·1 answer
  • The legs of a triangle measure 8 cm and
    10·1 answer
  • Shown here is a triangular striped sail, together with some of its dimensions. In the diagram, segments BJ, CI, and DH are all p
    10·1 answer
  • The munchery advertises if you have a different lunch everyday of the year and they offer 12 soups 6 sandwich meats and 4 differ
    8·1 answer
  • Pls help is it a b or c <br> will give brainliest btw
    9·2 answers
  • After ordering the data set, what is the next step in drawing a box plot that shows the distribution of the amounts spent? 1. Ma
    14·1 answer
  • Hey could anyone help?
    15·2 answers
  • Determine whether the statement describes an algebraic expression or an algebraic equation.
    15·1 answer
  • Does anyone know keeper of the lost cities??<br> DO NOT ANSWER IF YOU DON'T KNOW IT
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!