Answer:
$ 117.36
Step-by-step explanation:
On the drawing, the rectangular room measures 3 inches by 2 inches, we can convert to feet (using a scale of Inch - 2 feet )
(3 inches ×2) by (2 inches ×2)
= 6 feet by 4 feet
The Area of the room can now be calculated as
Area=( 6 feet × 4 feet)
= 24 ft^2
how much will the new carpet cost?
we know that the carpet costs $4.89 per square foot, then the cost by the area of the room= (Area× $4.89 per square foot)
=24 ft^2 x $4.89
=$ 117.36
Hence, the new carpet cost is $ 117.36
Answer:
1. A (85)(0.08)=6.90 then (85)(0.18)=15.30 then 85 + 6.90 + 15.30 =107.10
2. 82.68
Solving;
She was charged $65 before tax. She had to pay a 6% tax (65)(0.06)=3.90 then 65+3.90=68.90
After this she added 20% of the amount after tax rather 20% of 68.90
68.90(0.20)=13.78 then 68.90+13.78=82.68
4.3 repeating is the answer
Step 1: Assign variable for the unknown that we need to find.
Let x be the amount of cement needed.
Step 2: Set up a proportion based on the given information
Sand to Cement 
Step 3: Solve the proportion to find the value of x
![\frac{7}{3} =\frac{210}{x}\; [Cross\; multiplying\; on\; both\; sides]\\\\ 7\cdot x= 3\cdot 210\\ \\ 7x=630\; \; [Dividing\; by\; 7\; on\; both\; sides]\\ \\ \frac{7x}{7}=\frac{630}{7} \; [Simplifying\; the\; fraction\; on\; both\; sides]\\ \\ x=90](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B3%7D%20%3D%5Cfrac%7B210%7D%7Bx%7D%5C%3B%20%20%5BCross%5C%3B%20multiplying%5C%3B%20on%5C%3B%20both%5C%3B%20sides%5D%5C%5C%5C%5C%207%5Ccdot%20x%3D%203%5Ccdot%20210%5C%5C%20%5C%5C%207x%3D630%5C%3B%20%5C%3B%20%5BDividing%5C%3B%20by%5C%3B%207%5C%3B%20on%5C%3B%20both%5C%3B%20sides%5D%5C%5C%20%5C%5C%20%5Cfrac%7B7x%7D%7B7%7D%3D%5Cfrac%7B630%7D%7B7%7D%20%20%5C%3B%20%5BSimplifying%5C%3B%20the%5C%3B%20fraction%5C%3B%20on%5C%3B%20both%5C%3B%20sides%5D%5C%5C%20%5C%5C%20x%3D90%20)
Conclusion:
90 kg of Cement is needed !
