The <em><u>correct answer</u></em> is:
$19.99.
Explanation:
33 1/3% is equal to taking 1/3 of a number. To take 1/3 of a number, we multiply by 1/3:
29.99(1/3) = 29.99/3 = 9.9966666667 ≈ $10
This means the price is marked down by $10. This makes the new price 29.99-10 = 19.99
A) The formula for the volume of a sphere in terms of its radius (half the diameter) is

For your 18 cm sphere, the volume is

B) If the diameter were reduced by half, the volume would be

of the original volume.
The value of x is 5.4 ( find the description in the picture)
Shortest is 3/4 longest is 1 1/2. 1 1/2 -3/4=3/4