Answer:
9%
Step-by-step explanation:
Let the required number be 100.
Now, according to the question, the number is first increased by 30 %
⇒ 100 + 30 % of 100
⇒ 100 + [(30*100)/100]
⇒ 100 + 30
⇒ 130
Then, it is decreased by 30 %
⇒ 130 - (30 % of 130)
⇒ 130 - [(30*130)/100]
⇒ 130 - 39
⇒ 91
Net Decrease = 100 - 91
= 9
Percent Decrease = (Change in number*100)/100
⇒ (9*100)/100
= 9 %
Answer:
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The volume of the sphere in cubic inches is option D) 1767.1
<u>Step-by-step explanation</u>:
Given,
The diameter of the sphere = 15 inches
The radius of the sphere, r = diameter/2
=15/2
r =7.5 inches
The volume of the sphere = 4/3 πr^3
⇒ 4/3 π(7.5)^3
⇒ 4/3
3.14421.86
⇒ 1766.25 cubic inches
⇒ 1767 cubic inches (approximately)
Answer:21
Step-by-step explanation:
The kid makes 7 dollars an hour.
7*2=14
7*3=21
7*5=35
