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
Lyrx [107]
3 years ago
14

The observatory in the John Hancock Center in Chicago is located in the top floor, 900 feet above the ground. The express elevat

or travels nonstop from the ground floor to the observatory on the top floor at a rate represented by the equation y=30x, where y is the height, in feet, and x is the number of seconds.
Mathematics
1 answer:
Sedaia [141]3 years ago
6 0

Answer:

Step-by-step explanation:

Given the rate at which the elevator travels modeled by the expression;

y = 30x where y is the height, in feet, and x is the number of seconds.

If the observatory in the John Hancock Center in Chicago is located in the top floor, 900 feet above the ground, we can calculate the time taken to reach the top floor by substituting y = 900 into the equation and solve for x as shown;

y = 30x

900 = 30x

Rearrange

30x = 900

Divide both sides by 30

30x/30 = 900/30

x = 30

Hence it takes 30seconds for the elevator to reach the top floor

You might be interested in
Write 0.0003532 in scientific notation.
tatyana61 [14]
The answer is.... 3.532*10^-4
8 0
3 years ago
The graph shows the function f(x) = 3x.What is the value of x when f(x) = 9?
Law Incorporation [45]

Answer:

I'm just guessing so don't judge. 3

Step-by-step explanation:

5 0
3 years ago
The volume of the polyhedron is ______ cm3.
PSYCHO15rus [73]

Answer:

50.80 cm^3

Step-by-step explanation:

the polyhedron is a rectangular pyramid

Volume of a rectangular pyramid = 1/3 x ( width x height x length)

1/3 ( 4 x 5 x 3) = 20 inches

we need to convert inches to cm

1 in = 2.54 cm

20 x 2.54 = 50.80 cm^3

8 0
3 years ago
AB is tangent to the circle k(O) at B, and AD is a secant, which goes through center O. Point O is between A and D∈k(O). Find m∠
drek231 [11]

Answer:

∠BAD=20°20'

∠ADB=34°90'

Step-by-step explanation:

AB is tangent to the circle k(O), then AB⊥BO. If the measure of arc BD is 110°20', then central angle ∠BOD=110°20'.

Consider isosceles triangle BOD (BO=OD=radius of the circle). Angles adjacent to the base BD are equal, so ∠DBO=∠BDO. The sum of all triangle's angles is 180°, thus

∠BOD+∠BDO+∠DBO=180°

∠BDO+∠DBO=180°-110°20'=69°80'

∠BDO=∠DBO=34°90'

So ∠ADB=34°90'

Angles BOD and BOA are supplementary (add up to 180°), so

∠BOA=180°-110°20'=69°80'

In right triangle ABO,

∠ABO+∠BOA+∠OAB=180°

90°+69°80'+∠OAB=180°

∠OAB=180°-90°-69°80'

∠OAB=20°20'

So, ∠BAD=20°20'

5 0
3 years ago
Read 2 more answers
The critical points of a rational inequality are –1, 3, and 4. Which set of points can be tested to solve the inequality? x = 1
never [62]

Answer:

x=-3, x=1, x=3.5, and x=5

Step-by-step explanation:

Given the critical points (turning points) which represent the maximum or the minimum points, the set of points that can be tested to solve the inequality will consist of points to the right and to the left of these points. The set of points that solve the inequality will be simply the points where the graph of the function crosses the x-axis. From these information, the set of points will be as given above

4 0
3 years ago
Read 2 more answers
Other questions:
  • HELP ME PLZ!!!
    12·1 answer
  • Which letter in the word HAPPY has an order 2 rotational symmetry?
    6·2 answers
  • A pump currently contains 4 7/8 gallons of water but needs to be filled to capacity. The capacity of the pump is 9 5/8 gallons.
    5·1 answer
  • (transition to college mathematics.)
    11·1 answer
  • What is the intersection of plane STXW and plane SVUT
    14·1 answer
  • Three times the difference of a number and 9 is -3. Find the number
    13·1 answer
  • Which set of points does NOT represent a function?
    15·1 answer
  • Several months later, they both set out at 8:00 a.m. again, this time with Kiran jogging and Clare still walking at 3.4 miles pe
    10·1 answer
  • Help brainliest will be given 8 only
    14·2 answers
  • A squared plus b squared equals c squared calculator
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!