Answer:
12 2/5 hours
Step-by-step explanation:

12 2/5 hours have been logged in all.
1.
3x + 3 = 21
3x = 21-3
3x = 18
x = 18/3
Therefore,
x = 6
So option ( B) is the correct one.
2.

Therefore option (B) is the correct one here too.
FORMULA:
- Volume of hemisphere = 2/3πr³
ANSWER:
We are given a hemisphere of radius 3.1inches.
So, Volume = 2/3 × 3.14 × (3.1)³
- 187.08/3
- 62.36in³ or 62.4in³ rounded.
Answer:
2n² + 1
Step-by-step explanation:
Given polynomial:
(4n² + 3n – 5) − (2n² + 3n - 6)
Solution:
Removing parentheses,we obtain
Combine like terms:
Done!
Order:BPEMDAS
Answer:
25% decrease
Step-by-step explanation:
=(60−80)|80|×100
=−2080×100
=−0.25×100
=−25%change
=25%decrease