Answer:
8 = 4.40
9 = x
9(4.40)=39.6
39.6/8=4.95
So 19 tokens cost $4.95.
Step-by-step explanation:
Answer: find the third value when two values
The perimeter of ΔABC is 13 cm
Step-by-step explanation:
9514 1404 393
Answer:
x + 15
Step-by-step explanation:
The overall length is 2x+15, and the dotted side is shown to be x shorter than that. Its length is ...
2x+15 - x = x + 15 . . . . length of dotted side
Answer:
The number of people that received copies of the letter at the twentieth stage is<em> 9.537 × 10¹³ </em>.
Step-by-step explanation:
Using the discrete model,
a_k = r a_(k-1) for all integers k ≥ 1 and a₀ = a
then,
aₙ = a rⁿ for all integers n ≥ 0
Let a_k be equal to the number of people who receive a copy of the chain letter at a stage k.
Initially, one person has the chain letter (which the person will send to five other people at stage 1). Thus,
a = a₀ = 1
The people who received he chain letter at stage (k - 1), will send a letter to five people at stage k and thus per person at stage (k - 1), five people will receive the letter. Therefore,
a_k = 5 a_(k - 1)
Thus,
aₙ = a rⁿ = 1 · 5ⁿ = 5ⁿ
The number of people that received copies of the letter at the twentieth stage is
<em>a₂₀ = (5)²⁰ = 9.537 × 10¹³ copies</em>
