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
katovenus [111]
3 years ago
12

when heated an iron bar expands by 0.2 %.if the increase in length 1 cm, what is the original length of the bar?

Mathematics
1 answer:
gregori [183]3 years ago
5 0
0.2% = 2/100

increase amount over the whole amount

If the increase length is 1cm and you are looking for the whole amount

2/100 = 1/x

Cross multiply
2x = 100
x = 50 cm is the original length of the bar

Checking you answer,
0.2% of 50 is 0.02 × 50 which is 1 so the answer is correct.

The original length of the bar is 50 cm.
You might be interested in
Which of the following represents a polynomial expression? Select one: A. 2x + 3log(x) + 5 B. 10x−−√ − 2 C. (x + 1)(x - 1) D. 4x
Mnenie [13.5K]

Answer:

none!

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Can someone please HELP ME!!
IRISSAK [1]

Volume of a cone = PI x r^2 x h/3

Volume = PI x 5^2 x 9/3

Volume = 235.62 cubic cm.

Volume of a block of wax = L x W x H

Volume = 2 x 4 x 3 = 24 cubic cm.

Total number of blocks = Volume of cone / volume of blocks:

235.62 / 24 = 9.82

Round up to 10.

They will need 10 blocks.

4 0
3 years ago
A triangle has three sides: a, b, and c. Side a = 72 feet, and side b = 154 feet, and side c = 170 feet. True or false: this tri
Juliette [100K]

Answer:

True

Step-by-step explanation:

If the triangle was a right angled triangle then we can prove it using the Pythagoras theorem: c² = a² + b²

c is the largest side and a and b are the two smaller sides of the triangle.

So if this is true then √72² + 154² should be 170:

170² = 72² + 154²

28900 = 5184 + 23716

28900 = 28900

So we have proved using Pythagoras theorem that the triangle is a right angled triangle.

8 0
3 years ago
Annie plants 6 rows of small flowers bulbs in a garden she plants 132 bulbs in each row.how many bulbs does Annie plant?
andrew11 [14]
(792 bulbs) To answer this question one would multiply the number of rows times the number of bulbs 6 x132= ? to get the answer.
3 0
3 years ago
Read 2 more answers
Enter the value of 3^3+4⋅(5^2−4^2).
Oduvanchick [21]
The answer is 63:)))) promise this is correct 10000%
3 0
3 years ago
Read 2 more answers
Other questions:
  • Ryleigh received a $50 gift card to the frozen yogurt shop for her birthday. The shop sells yogurt sundaes for $4 and yogurt con
    5·2 answers
  • HEALP!
    11·2 answers
  • What is the answer and and show me how to show my work
    8·1 answer
  • The top of the rectangular box is 15 cm by 20 cm and its hight is 4 cm. And ant begins at one corner of the box and walks along
    12·1 answer
  • O
    14·1 answer
  • Leah predicts that she will need to contribute $7,000 per year for college tuition and already has $4,000 in savings. She is beg
    15·1 answer
  • How do you simplify -0.3 + 25/100
    13·1 answer
  • Please help me it’s due soon-
    9·1 answer
  • Which expression is equivalent to 6s - 4
    6·2 answers
  • Please help with this question!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!