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
A regular hexagon and a rectangle have the same perimeter, P. A side of the hexagon is 4 less than the length, l, of the rectang
disa [49]

The answer and explanation is given in the picture below

I hope it helps.

3 0
3 years ago
What is the equation?
pishuonlain [190]

Answer:

(x - 7)^2 + (y - 2)^2 = 5^2

Step-by-step explanation:

Center at (7, 2); radius 5

Adapt (x - h)^2 + (y - k)^2 = r^2 to this situation.  Replace h by 7, k by 2 and r by 5:

(x - 7)^2 + (y - 2)^2 = 5^2

3 0
3 years ago
Find the surface area of this triangular prism. Be sure to include the correct unit in your answer.
BartSMP [9]

Answer:

905 is the perimeter

and the triangular prism is 46

Step-by-step explanation:

mark me BRAINLIEST

4 0
3 years ago
James is kayaking. He can row 3 mph in still water. If he can travel 6 miles downstream in the same amount of time that he can t
nekit [7.7K]

Answer: the speed of the current is 0.6 mph

Step-by-step explanation:

Let x represent the speed of the current.

James is kayaking. He can row 3 mph in still water. If he can travel 6 miles downstream. Assuming he went with the current, it means that his total speed while travelling downstream is (3 + x)

Time = distance/speed

Time taken to travel downstream is

6/(3 + x)

In the same amount of time, he can travel 4 miles upstream. Assuming he went against the current, it means that his total speed while travelling downstream is (3 - x). Time taken to travel upstream is

4/(3 - x)

Since the time is the same, then

6/(3 + x) = 4/(3 - x)

Cross multiplying, it becomes

6(3 - x) = 4(3 + x)

18 - 6x = 12 + 4x

4x + 6x = 18 - 12

10x = 6

x = 6/10

x = 0.6 mph

4 0
3 years ago
How is the graph of the parent function y = StartFraction 1 Over x EndFraction transformed to create the graph of y = negative S
faltersainse [42]

Answer:

The answer is c horizontally compressed by a factor of 3 and reflected over the x-axis.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Janet has a square-shaped sheet of wrapping paper. To cover the top of a box, she cuts off 11 centimeters of the sheet along the
    5·2 answers
  • Madelyn hopped 12 times in 15 seconds. What's her speed hops per minute
    6·1 answer
  • A certain fungus grows in a circular shape. Its diameter in inches after t weeks is given below 6 -(50/t^2+ 10). What is the squ
    13·1 answer
  • ABCD = EFGH find EF <br> ab=5 dc=4 fg=1
    11·1 answer
  • 1. Forrest is purchasing a car priced at $7,299. His down payment is $299 and his monthly payments are $165 per month for 48 mon
    13·1 answer
  • What are the coordinates of D’
    10·1 answer
  • A 64 ounce orange juice has 48 ounce of water in it, what is the percentage of the water.
    6·1 answer
  • Need help for geo..will mark brainlist
    10·1 answer
  • What is the value of h? g = -7.1 h = 3 - 10g
    5·1 answer
  • What is the volume of this prism?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!