A geometric sequence can always be expressed as:
a(n)=ar^(n-1), a=initial value, r=common ratio, n=term number
We are told that a(5)=25 and r=5 so we can say:
25=a5^(5-1)
25=a5^4
25=625a
a=1/25 so now we know our explicit formula for this geometric sequence:
a(n)=(1/25)(5^(n-1)) and the first three terms will be a(1), a(2), and a(3)
1/25, 1/5, 1
Answer:
C or A
Step-by-step explanation:
Answer: :(
Step-by-step explanation: you said 20
There are 36 green marbles. The ratio of white to green is 5:12, and 5+12=17. 17x3=51. Multiplying the ratio by 3 gives 15:36. When added, these numbers add to 51. So, there are 15 white marbles and 36 green marbles.
Answer:
Step-by-step explanation:
According to the information provided in the exercise, the prices of each item he wants to purchase in the sporting goods store are:
Therefore you need to add these prices to solve this exercise. The sum will be the total cost for these three items.
You get that the sum is:
Then, the three items that Cisco wants to purchase will cost $73.43.