I need help please rational or irrational question
2 answers:
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Answer:
The number is 492,875.
Step-by-step explanation:
Given:
A number that is =
Place value of 4 =
Place value is ten thousands.
We have to identify the number where the place value of 4 is 10 times of the given number.
Numbers given:
284,796 or 327,498 or 492,875 and 742,186.
Lets see the place value of 4 in each of the number.
⇒
-
place value of
is
.
- Place value of 4 is thousands.
⇒
place value of
.
- Place value of 4 is hundreds.
⇒
place value of
.
- Place value of 4 is hundred thousands.
⇒
place value of
.
- Place value of 4 is ten thousands.
Notes:
Ten thousands multiplied with ten is hundreds thousand.
⇒
So,
The number which has digit 4 as hundred thousands place values is 492,875.
Answer:
The approximate volume of rubber used to make the ball is 636.4 cm³ ⇒ 3rd answer
Step-by-step explanation:
The formula of the volume of a sphere is V = π r³, where r is its radius
∵ The hollow ball is shaped a sphere
∵ The ball has a radius to the outside surface of 6 centimeters
∴ The outer radius = 6 centimeters
∵ The ball is made of rubber that is 2 centimeters thick
∴ The thickness of the rubber = 2 centimeters
- The difference between the outside radius and the inside
radius is equal to the thickness of the rubber
∴ The inner radius = 6 - 2 = 4 centimeters
The volume of the rubber = the outer volume - the inner volume
Lets calculate the outer and inner volumes
∵ V = π r³
∴ V(inner) = (3.14)(4)³
∴ V(inner) = 267.95 cm³
∴ V(outer) = (3.14)(6)³
∴ V(outer) = 904.32 cm³
- By using the rule above find the volume of the rubber
∵ The volume of the rubber = 904.32 - 267.95
∴ The volume of the rubber = 636.37 cm³
- Round it to the nearest tenth
∴ The volume of the rubber = 636.4 cm³
The approximate volume of rubber used to make the ball is 636.4 cm³