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
sashaice [31]
3 years ago
7

The washer in the image has an inner diameter of 1/4 inch. The outer diameter measures 3/4 inch, and the washer is 1/4 inch thic

k. The density of the metal that washe
made ofis 0.285 pounds per cubic inch. What would the weight of 5 washers be in pounds?

Mathematics
1 answer:
Talja [164]3 years ago
5 0

Answer:

  0.14 lb . . .  closest choice is 0.11 lb

Step-by-step explanation:

The inside and outside radii are 1/8 in and 3/8 in, respectively. Then the area of the top of the washer is ...

  A = π(R² -r²) = π((3/8)² -(1/8)²) = π(9/64 -1/64) = π/8 . . . square inches

The height of the stack of 5 washers will be 5×(1/4 in) = 5/4 in. So, the volume of material in the stack of washers is ...

  V = Bh = (π/8)(5/4) = 5π/32 . . . cubic inches

The weight of material is the product of volume and density, so is ...

  W = (5π/32 in³)(0.285 lb/in³) ≈ 0.1399 lb ≈ 0.14 lb

_____

<em>Comment on the question</em>

Since this answer does not correspond to any of the offered choices, we suggest you ask your teacher to work this out for you. We suspect they will have difficulty justifying any of the answer choices shown here. (0.11 lb corresponds to 4 washers, not 5.)

You might be interested in
3. A charity had a stall at a fair selling crafts and cakes to raise money.
AveGali [126]

15% of £70= £10.5

Expenditure =£24+£10.5=£34.5

Net amount raised =gross amount - Expenditure

=£70-£34.5=£35.5

3 0
3 years ago
Help please I need this fast
tangare [24]

Answer:

D. 6i

Step-by-step explanation:

3 0
3 years ago
I need help with letter D
Ivahew [28]
To find 1. all you have to do is 165/30 and you get $5.50. To find 2. you have to add 165+45 you get 210. then divide 210/40 and you get 5.25
4 0
3 years ago
Type an expression using words to represent each of the given algebraic expressions. Enter your answer in the box
poizon [28]

Answer:

3 whole multiply by M subtracted from 7

Step-by-step explanation:

8 0
3 years ago
Which expression is equal to 4-6
frez [133]

-1-1 or 2-4 or 3-5 or 6-8 or 7-9 or 8-10

6 0
2 years ago
Other questions:
  • find two consecutive intergers who sum is equal to the difference of three times the larger and two times the smaller
    13·1 answer
  • A teacher wants to find out the average number of weekly reading hours of her students. She noted the number of reading hours of
    6·2 answers
  • Z2 - (y = 7, and z=10​
    15·1 answer
  • $16 for 2 tickets; $40 for 5 tickets
    12·2 answers
  • Which system of linear inequalities is represented by the
    9·1 answer
  • Second piece help ASAPP..
    10·2 answers
  • K. Tony is thinking of a number. If you
    10·2 answers
  • Find side BC for the triangle shown (round to the nearest tenth).
    12·1 answer
  • How many ounces of flour would you need for 9 ounces of milk?
    7·2 answers
  • Lines AB and CD are parallel. Find the measures of the three angles in triangle ABF.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!