Answer:
The different variable in C is 21213316700.
Explanation:
Given value:
Total value = letters + underscore value
Total value = 52 + 1
Total value =53
choice for first character = 53 letters +10 digits
first character = 63
choice for remaining characters
So,
Variable number With one 1 character = 53
Variable number With 2 character = 53 × 63
Variable number With 3 character = 53 × 63²
Variable number With 4 character = 53 × 63³
.
.
.
Variable number With 7 character = 
Total difference variable = 53 + 53 × 63+ 53 × 63²+ 53 × 63³+....+ 
Total difference variable = 53(1 + 63 + 63²+ 63³+ .... +
)
Formula:

Total difference variable

Answer:
here is code in C++.
#include <bits/stdc++.h>
using namespace std;
int main()
{
// variables to store number of each video
int new_video,old_video;
double total_charge;
cout<<"Please enter number of new video:";
// read number of new video
cin>>new_video;
cout<<"Please enter number of old video:";
// read number of old video
cin>>old_video;
// total change
total_charge=(3.0*new_video)+(2.0*old_video);
cout<<"total cost is: "<<total_charge<<endl;
return 0;
}
Explanation:
Declare two variables "new_video" and "old_video" to store the number of each type of video.Read the value of both from user.Then calculate total charge by multiply 3.0 to number of new video & 2.0 to number of old video and add both of them. This will be the total charge.
Output:
Please enter number of new video:4
Please enter number of old video:6
total cost is: 24
Answer:
What is the coordinates of points B in the diagram
Explanation:
D
One quarter note plus one eighth note equals one and a half beats. So a dotted quarter note lasts for one and a half beats.
It depends solely on how much you will use it. For example, laser printers are more suitable for offices, schools, and environments, where the printer is used almost constantly. If it's used a lot, you're probably looking at a laser printer, since the cartridges have a slightly higher price, but a much higher yield. If you can't afford a laser printer, and you're only going to use it at home, you're probably looking at an inkjet. If you need to print off something for school, ask your teacher, or someone that works at your school. Some secondary/high schools might allow you to use their printers at a lower price