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
patriot [66]
3 years ago
11

Karl starts the engine on his small private airplane. The engine drives a propeller with a radius of 9 feet and its centerline 1

2.5 feet above the ground. At idle, the propeller rotates at a constant speed of approximately 750 revolutions per minute. The height of one propeller tip as a function of time is given by h = 12.5 + 9 sin(750t), where h is the height in feet and t is the time in minutes. Find h when t = 3.5 minutes.
Mathematics
2 answers:
Marta_Voda [28]3 years ago
5 0

Answer:

a=21.1

Step-by-step explanation:

sukhopar [10]3 years ago
4 0

Answer:

  • 3.68 feet using given equation (wrong)
  • 12.5 feet using correct equation

Step-by-step explanation:

You can use the given (incorrect) equation and fill in the value of t to find h:

  h = 12.5 +9sin(750(3.5)) = 3.68 . . . . feet

__

Or, you can use the correct equation, or just your knowledge of revolutions:

  h = 12.5 +9sin(750(2π·3.5)) = 12.5 . . . . feet

in 3.5 minutes at 750 revolutions per minute, the propeller makes 2625 <em>full revolutions</em>, so is back where it started — at 12.5 feet above the ground.

You might be interested in
(look at the image) can i get help with these 2 questions?
Oduvanchick [21]
18. 105=2x-11 so 105+105=210 and all four angels equal 360 so 360-210=150 so 150/2=75

19. 6x+19+x =180
X=23
So AEB:75 BEC:123 CED:75 AED:23
Please give brainliest it took for ever
5 0
3 years ago
Kali runs 10 laps around a track each day. Each lap around the track is 400 meters. How many days will it take Kali to run a tot
ra1l [238]
It will take Kali 3 days, or 30 laps to run a total of 12 kilometers. 
6 0
3 years ago
Read 2 more answers
Maria lives 98 miles away from her grandparents. She wants to be at her grandparents’ house by 3:00 pm. If she leaves her house
RideAnS [48]

Answer:   B

Step-by-step explanation:

3 0
3 years ago
PLZ HELP ASAP!!!
Nataliya [291]
A to b to c to d to e
7 0
3 years ago
Walk me through solving this one-step equation for x.<br><br> -18 + x = -11
Leviafan [203]

-18 + x = -11

Let's add 18 to both sides

x = 7

8 0
3 years ago
Read 2 more answers
Other questions:
  • On Saturday, Craig rode his bike 5/8 of a mile. On Sunday, he rode his bike 1/2 of a mile. Craig added 5/8 + 1/2 to find the tot
    15·1 answer
  • (125) - ( ) = -100
    14·2 answers
  • How many 1/6 are in 21/2
    9·2 answers
  • Find all the solutions in the interval [0,2π) <br> sin²x = 2-2cosX
    13·1 answer
  • Which is greater 2 1/3 or 2.3
    5·2 answers
  • PLZ HELP!!<br><br> 39+(-20.4) <br><br> When you answer can you plz show how you got the answer plz!!
    11·2 answers
  • I need help please :(​
    11·1 answer
  • Which of the following expressions is equal to 5^6/5^2
    8·1 answer
  • Find the elapsed time
    7·1 answer
  • The image of the point (-7, 8) under a translation is (-11, 6). Find the coordinates
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!