Robert the number 80, if the rule is subtract 7, what is the third number in Rob's pattern
1 answer:
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The sum of the first 8 terms is 2.51 to the nearest hundredth
Step-by-step explanation:
In the geometric sequence there is a constant ratio between each two consecutive terms
The formula of the sum of n terms of a geometric sequence is:
, where
- a is the first term
- r is the constant ratio between the consecutive terms
∵ The sequence is 6 , -5 , 25/6 , .............
∵ -5 ÷ 6 =
∵ ÷ -5 =
- There is a constant ratio between the consecutive terms
∴ The sequence is a geometric sequence
∵ The first term is 6
∴ a = 6
∵ The constant ratio is
∴ r =
∵ We need to find the sum of 8 terms
∴ n = 8
- Substitute the values of a, r and n in the rule above
∴
∴
- Round it to the nearest hundredth
∴
The sum of the first 8 terms is 2.51 to the nearest hundredth
Learn more:
You can learn more about the sequences in brainly.com/question/7221312
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Total price Tiffany pays for the basket of watermelons is $9.81
<u>Step-by-step explanation:</u>
Here we have , Tiffany buys a basket of watermelons on sale for $9 . The sales tax is %9, percent. We need to find what is the total price Tiffany pays for the basket of watermelons? . Since, Tiffany buys a basket of watermelons on sale with a price tag of $9 , she takes it ! Now, she goes in reception for billing , then its known to her that there is 9% tax ,so she pays an extra 9% amount of money of price i.e. .
Therefore , Total amount of money Tiffany pays = $9 + $0.81 = $9.81
Total price Tiffany pays for the basket of watermelons is $9.81