Answer:
140
Step-by-step explanation:
Solve 40% of 350.
Answer:
23
Step-by-step explanation:
3x+3=72
3x=72-3
3x=69
x=23
Answer:
42 Volunteers
Step-by-step explanation:
The time (T) that it takes a group of volunteers to construct a house varies inversely as the number of volunteers (V).
This is written as:
![V \propto \frac{1}{T} \\$Introducing the variation constant k\\V = \frac{k}{T}\\$It takes 20 volunteers to build a house in 63 hours.$\\When V=20, T=63\\V = \frac{k}{T}\\20 = \frac{k}{63}\\k=20*63=1260\\$Therefore, the equation connecting V and T is:$\\V = \frac{1260}{T}\\$When T=30 hours, we want to determine the number of volunteers needed V$\\V = \frac{1260}{30}=42\\$42 Volunteers will be needed.$](https://tex.z-dn.net/?f=V%20%5Cpropto%20%5Cfrac%7B1%7D%7BT%7D%20%5C%5C%24Introducing%20the%20variation%20constant%20k%5C%5CV%20%3D%20%5Cfrac%7Bk%7D%7BT%7D%5C%5C%24It%20takes%2020%20volunteers%20to%20build%20a%20house%20in%2063%20hours.%24%5C%5CWhen%20V%3D20%2C%20T%3D63%5C%5CV%20%3D%20%5Cfrac%7Bk%7D%7BT%7D%5C%5C20%20%3D%20%5Cfrac%7Bk%7D%7B63%7D%5C%5Ck%3D20%2A63%3D1260%5C%5C%24Therefore%2C%20the%20equation%20connecting%20V%20and%20T%20is%3A%24%5C%5CV%20%3D%20%5Cfrac%7B1260%7D%7BT%7D%5C%5C%24When%20T%3D30%20hours%2C%20we%20want%20to%20determine%20the%20number%20of%20volunteers%20needed%20V%24%5C%5CV%20%3D%20%5Cfrac%7B1260%7D%7B30%7D%3D42%5C%5C%2442%20Volunteers%20will%20be%20needed.%24)
These are the answers with the picture of square root of 64 as number 1
1) 8
2) 81
3) 5
4) 41
5) 6
6) 4
7) 19
8) 30
9) 19
10) 20
11) 7
12) 68
13) 20
14) 65
15) 6
16) 6
U is 6 that is the final answer