Answer:
Step-by-step explanation:
factors of 84 = 2* 2 * 3 * 7
1) 21 *4 ===> 21 beads , 4 rows
2) 14 * 6 ===> 14 beads , 6 rows
3) 12 * 7 ===> 12 beads, 7 rows
The rule of geometric sequence is ⇒⇒⇒ a * r^(n-1)
Where a is the first term and r is the common ratio
for the given sequence √5 , √10 , 2√5 , .......
a = √5
r = √10 / √5 = √2
The ninth term = √5 * (√2)^(9-1) = √5 * (√2)⁸ = 16 √5
the correct answer is the third option 16√5
8,80 ywahhh ok yw trying to get 20 scharcters
Answer:
arrange it first in increasing order
42,55,69,74,78,83,83,97,99
n=9
we have
Q2=(n+1)/2th term=(9+1)/2th term=5thterm=78
We need to find 30% of 20 gallons.
1) We can write a proportion
20 gallons ---- 100%
x gallons --------30%
x = 20*30/100 = 6 gallons
2) Or we can write 30% as decimal.
30% = 30/100 = 0.3
0.3 of 20 = 0.3*20 =6 gallons
Answer 6 gallons are used efficiently.
