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
aleksley [76]
3 years ago
8

A heated piece of metal cools according to the function c(x) = (.5)^(x _ 11), where x is measured in hours. A device is added th

at aids in cooling according to the function h(x) = _x _ 3. What will be the temperature of the metal after five hours?
A. _8Á Celsius

B. 26Á Celsius

C. 32Á Celsius

D. 56Á Celsius
Physics
2 answers:
alina1380 [7]3 years ago
4 0

Answer:

Option D

Explanation:

A heated piece of metal cools according to the function c(x) = (0.5)^{x-11}

And a device which aids in cooling is added is represented by the function h(x) = -x - 3

Temperature of the metal after x hours will be represented by

c(x) + h(x) = (0.5)^{x-11}+(-x-3)

               = (0.5)^{x-11}-x-3

We have to find the temperature after 5 hours

So c(5) - h(5) = (0.5)^{5-11}-5-3

                     = (0.5)^{-6}-8

                     = 64 - 8

                     = 56° Celsius

Option D is the answer.

Agata [3.3K]3 years ago
3 0
You just need to replace x with 5 in each function

.5^5 - 11
-5-3

.5 ^-6
-8


64 - 8 = 56 A Celcius

Hope this helps
You might be interested in
Look at the circuit diagram. <br><br> What type of circuit is shown?
Nimfa-mama [501]

Answer:

Its a parallel connection

Explanation:

The bulbs aren't in one line but two different parts, which makes it a parallel connection instead of a series connection.

7 0
3 years ago
Read 2 more answers
Why do blades come in different lengths in a jig saw sander?​
trasher [3.6K]

Answer:

To determine the minimum blade length, add 1" to the workpiece thickness. One type of material, and some materials can be cut by more than one type of blade. No matter the material, there's likely a jigsaw blade designed specifically for. Armed with the right blade, follow these pointers to make your work go (and cut) .

Explanation:

6 0
3 years ago
A example of using a muscular strength?
DIA [1.3K]
An example of using muscular strength would be doing things like lifting weights and things like that. 
7 0
3 years ago
Read 2 more answers
How does gravity affect potential energy?
wel
This is more along the lines of "Does gravity affext potential energy" Sort of. Potential energy is an odd one to imagine, sometimes. It's the energy possessed by an object or system by dint of it's spatial and mechanical configuration. That definition alone is perhaps not so useful...and it's certainly not official. But what it means is that an object can potentially have energy due to where it is or what state the system is in. Imagine we have a box and it's on the floor. The box, for all intents and purposes, has no potential energy. It isn't going anywhere and it just sits on the floor. It can't do any work in it's current position. Now we hoist the box into the air. For any distance the box travels from the floor, it gains potential energy. Now let's back track. We've changed the box's spatial configuration by hoisting it into the air and so have given it potential energy. Why does it now have potential energy? Because we can now drop the box (costing us no energy) and the box will fall. Maybe it falls onto a passer-by and injures them. Box on the floor = No energy. We lift the box = We spend our energy and give the box potential energy (as it wants to fall toward the ground). We drop the box = Potential energy is converted to kinetic energy as the box falls. Box injures someone = The kinetic energy has done work upon the person. So we can see how it all flows and connects. We have to put energy into the box to fight against gravity, but you can't destroy or create energy....so the energy we've spent is potentially stored 'inside' the box. Clearly, gravity effects a LOT of potential energies around us. In fact to some small extent, it's probably impossible to entirely avoid it's effects.
5 0
3 years ago
Why do tin roofs make creaking sounds on hot days?
laiz [17]

Answer: Yes, on many slate-roofed homes as temperatures change, such as cooling at night or heating during the day, thermal expansion or contraction of the slates may cause movement that in turn causes snapping, popping, or cracking noises, even bangs and clanks or clicks from the roof.

Explanation:

8 0
4 years ago
Read 2 more answers
Other questions:
  • Which of the following statements are true? Check all that apply. Check all that apply. The gravitational force between two obje
    14·2 answers
  • A research assistant in a lab conditions dogs to salivate to the sound of a bell. During conditioning, the assistant deliberatel
    6·1 answer
  • Which is a negative effect of deforestation on the environment? A. habitat restoration B. desertification C. soil production D.
    7·2 answers
  • shows two parallel nonconducting rings with their central axes along a common line. Ring 1 has uniform charge q1 and radius R; r
    7·2 answers
  • Indicate whether the statement is true or false. If false, change the identified word or phrase to make me su
    14·2 answers
  • a speed of 30 cm per second means the cart moves 30 cm every second. What was the final speed of the cart?
    12·1 answer
  • The value found for the universal gravitational constant, G, will vary depending on the materials used for the balls of a Cavend
    10·1 answer
  • Is anyone good at science I need help with 2 tests
    10·1 answer
  • How can you increase the pressure on an object?
    15·1 answer
  • Do you think solar roofs and energy storage batteries will become widespread in the future? Why or why not?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!