I think the answer is c, 88
Hope this helps :)
Answer:
Final answer is 123.
Step-by-step explanation:
Given that there are 820 people at a stadium.
Out of which 65% are adults, 20% of them are boys, and the rest are girls.
Now we need to find about how many girls are there at the stadium?
We know that total percent can be 100%
So percentage of girls in the stadium = (Total %) - (Adults %) - (Boys %)
= 100% - 65% - 20%
= 100% - 85%
= 15%
Then total number of girls at the stadium = 15% of 820
= 0.15 ( 820)
= 123
Hence final answer is 123.
Answer:
17) 750/9 and 18) 364
Step-by-step explanation:
17. Summation of 75*(0.1)^i from i=0 to infinity, that is equal to 75*(Summation of (0.1)^i). Summation of (0.1)^I is a geometric series with a sum of 1/(0.9)=10/9. Hence the series have a sum equal to 75*(10/9)=750/9
18) It's a series with sum=1+3+9+27+81+243=364
Answer: D(-2, -4)
All you have to do in this situation is make your answer negative, because they will both be going to the negative side. This also would be the same thing for if they are already negative you turn them positive.