Given AP is 21 ,18,15,...
First term = 21
Common difference = 18-21 = -3
Let an = -81
We know that
an = a+(n-1)d
⇛21+(n-1)(-3) = -81
⇛ 21-3n+3 = -81
⇛24-3n = -81
⇛ 24+81 = 3n
⇛ 105= 3n
⇛ n = 105/3
⇛ n = 35
35th term of the AP is -81.
<u>also</u><u> read</u><u> similar</u><u> questions</u><u>:</u> Which term of a AP 5 , 13 , 21 ,... is 181?
brainly.com/question/2406241?referrer
Which term of the AP:3, 8, 13, 18,...,is 78?
brainly.com/question/15380012?referrer
Answer:
14400 blinks per day
Step-by-step explanation:
We need to convert minutes to days
60 minutes = 1 hour
24 hours = 1 day
The units will cancel leaving blinks per day.
150 blinks 60 minutes 24 hour 216000
---------------- * ---------------------- * ------------ = --------------- blinks/day
15 minutes 1 hour 1 day 15
14400 blinks per day
Simplified
2/5x-5-1/3
2 x -5 - 1/3
5
-10/5 - 1/3
-2 - 1/3
-7/3
