Need help please asapp

B

Explanation:

0.05 is the decimal form of 5%

So the sale amount times 0.05 will give the tax amount

Hope this helps!

Answered below

Explanation:

#program is written in Java

class RoomDimension{

double length;

double width;

RoomDimension (double length, double width){

this.length = length;

this.width = width;

}

public double roomArea ( ){

return length * width;

}

}

class RoomCarpet{

RoomDimension rd;

double price;

RoomCarpet ( RoomDimension rd, double price){

this.rd = rd;

this.price = price;

}

public double totalCost( ){

double area = rd.roomArea();

return area * price;

}

}