To find whether the volume would be doubled when the radius is,we can find the volume of the two balloons.
The formula of a sphere is:
Let's take 丌 as 3.14
The volume of the balloon with 4cm radius:
The volume of the balloon with 8cm radius:
As we can see,
267.94668 × 2 = 535.89 ≠2145.56
Thus,she wouldn't discover that the volume is twice as big when the radius is doubled.
Hope it helps!
The answer to the equation should be in cents whereas it is in dollars which would be incorrect
Let us assume the larger number = x
Let us assume the smaller number = y
Then
x + y = 3 3/4
x + y = 15/4
And
x/3 = (2y/3) + 1/2
x = [3 * (2y/3)] + (3/2)
= 2y + (3/2)
Now putting the value of x from the second equation to the first , we get
x + y = 15/4
2y + (3/2) + y = 15/4
3y = (15/4) - (3/2)
3y = (15 - 6)/4
3y * 4 = 9
12y = 9
y = 9/12
= 3/4
Now putting the value of y in the first equation, we get
x + y = 15/4
x + (3/4) = (15/4)
x = (15/4) - (3/4)
= (15 - 3)/4
= 12/4
= 3
So the value of x or the larger number is 3 and the value of y or the smaller number is 3/4.
You would have to multiply 120 x 20 then divide by 8. I hope that helps you!
You need to do 14 divided 3/12 which gives you the cost per pound