Answer:
2 minutes
Step-by-step explanation:
Because it takes 30 seconds to get from 20th floor to 15th floor which is 5 floors, which means that it takes 30 seconds for 5 floors. 5 times 4= 20
which makes 20 floors, 4 times 30 seconds= 120 seconds or 2 minutes.
Answer 7
Explanation
you need to divide 63 by 9 to get 7
Water. ••• All living organism needs some water intake.
To find the variance, you must square the standard deviation, or <span>σ.
</span>
<span>σ = 23.9
The variance is
</span>
<span>σ²= 23.9² = 571.21
</span>
Answer:
28
Step-by-step explanation:
His aces on 80 serve = 35% of 80
= 35/100 × 80
= 28