Answer:
a.
b. $225
Step-by-step explanation:
Let Mr. Scruggs got money for his birthday be 'a'
He spent of it on dog treats = a ×
=
remainder amount would be = a -
=
Then he divided the remainder money equally among 3 favorite charities.
=
a. Each charity receive
b. If he donated $60 to each charity.
a = $225
Mr. Scruggs received $225 for his birthday.
For the given geometric series the value of the common ratio(r) is 3, while the value of a₁ is 1.
<h3>What is geometric series?</h3>A series of numbers whose any two consecutive numbers are always in a common ratio of that series.
Given to us
Series, 1 3 9 27 81
To find the value of the common ratio(r), we will simply find the ratio of any two consecutive numbers, therefore,
As we can see the common ratio of the given series is 3, therefore, every next number will be thrice the number before.
We need to find the value of a₁ for the given series, and as we know that a₁ is the first number of the series with which the series is starting, therefore,
a₁ = 1
Hence, for the given geometric series the value of the common ratio(r) is 3, while the value of a₁ is 1.
Learn More about Geometric Series:
Answer:
Step-by-step explanation: