Answer:
21. An= 100 (2)^n-1
22. $51,200
23. n= 15
Step-by-step explanation:
21. 100, 200, 400, 800, 1600...
An= A r ^n-1
22. a10= 100(2)^10-1
a10= 100(2)^9
23. n=14
a14= 100(2)^14-1= 819200
n= 15
a15= 100(2)^15-1= 1638400
Probability 1st song is sung by female : 55/100 reduces to 11/20
probability 2nd song is sung by a male : 35/100 reduces to 7/20
probability 3rd song is instrumental : 10/100 reduces to 1/10
probability of all 3 events happening : 11/20 * 7/20 * 1/10 = 77/4000
3+(5+8)<span>
</span>The Associative Property of Addition states that you can add or multiply numbers any way, it doesn't matter how they are grouped.
Answer:
18
Step-by-step explanation:
There are 2+3 = 5 ratio units representing 45 band members, so each ratio unit represents 45/5 = 9 band members.
The 2 ratio units of sixth graders represent 2×9 = 18 sixth grade band members.
