The fraction 1/10 is the same as 10%, 1/10 x 100 = 10%. 10% is the amount that is used; so 90% is available,
100%-10% = 90%.

Find the area of the four walls. Two of the walls are 15 feet by 8 feet. The other two walls are 12 feet by 8 feet; 15 x 8 = 120 square feet; 12 x 8 = 96 ft2. The total area of the walls in the room is 120 +120 + 96 + 96 = 432 square feet. Next, find the number of gallons of paint that must be purchased. Each gallon covers 300 square feet, so two gallons will be needed. Last, calculate the cost of those two
gallons of paint; 2 x $25.50 = $51.00.

A circle will provide the largest area. In order to find the area of the circle, you must find the radius using the circumference
(perimeter), which is 12.73 ft,
C = 3.14x2xr,80 = 3.14x2xr;
r = 12.
73. The area of a circle is calculated by A=3.14r(2), giving a total of 509.8 sq. ft. If a square shape were built, the sides would be 20 x 20 (8% = 20) giving an area of only 400 sq. ft., 20 x 20 = 400. Playing around with numbers for a rectangle will show that the area would not be able to exceed the circle.

1. Calculate the effective length of rebar.
a. 30D indicates to multiply 30 x diameter of the rebar.
Convert the 3/4" fraction to a decimal.
3/4" = 0.75"
30 x 0.75 = 22.5"
b. Convert inches to feet. 22.5" / 12" = 1.875' (loss)
c. Subtract the loss from the length of the bar.
20' - 1.875' = 18.125'
2. Use the formula: Quantity x Length / Effective Length = # Rebars Needed
4 x 440' / 18.125' = 97.1 rebars (Round up to 98)

Firstfind the number of tractors that will have a discounted price,2/3 of the 291 tractors is 194, 2/3 x 291 = 194.

The 1,400 ft2 home costs about $14.29 per ft2:
$20,000 +1,400 square feet = $14.29 per ft2.
The 2,200 ft2 home costs about $12.23 per ft2:
$28,000 + 2,200 square feet = $12.73 per ft2.
The 2,500 ft2 home costs about $14 per ft2:
$35,000 + 2,500 square feet = $14 per ft2.
The cheapest price perft2 is $12.73 by Smithco. If this company is
hired to construct 2,800 ft2 homes, it will cost $35,644 per home:
2,800 square feet times $12.73 per ft2 = $35,644.
Rounded to the nearest thousand, the answer is $36,000.

Take the total money and divide it by the cost to find out how many can be purchased, $854/$58 = 14.72. For this problem you must round down to 14 drills. If you try to purchase 15 drills the total bill will be too high, 15 x $58 = $870.

The tank was 2/5 empty, which means it was % full, 1-2/5 = 5/5-2/5 = 3/5. 3/5 of the total capacity is equal to 310 gallons so the capacity of the tanker is 516.7 gallons.

(3/5)x = 310

= 310x5/3,x = 516.7.

The first stop took 2/9 of the original 310 which means 241.1 gallons remain, 2/9 x 310=68.9.

The next stop took 1/3 of the remaining 241.1 gallons, resulting in 160.7 gallons left over, 1/3 x  241.1 =80.4 =160.7.

For the fill up at the end, the truck will need 356 gallons, 516.7-160.7 = 356.

Figure out the subtotal cost of the two hand saws;
$37.50 x 2 = $75.
To calculate the tax, translate_____is 8% of $75 into an equation:
y = .08 x $75. Solve y = $6 which represents the 8% tax. In order to find the total cost of the sweaters, add the 8% tax, $6, to the original price, $75;
$75 +$6 = $81.
To figure out the customer's change, subtract the total, $81, from the amount of cash given, $100;
$100-$81 = $19 change.

Take the total distance and divide it by the length of the board, 24 32 2/16 = 20.125, and then you will need to round up to 21. Twenty ' boards is not enough because it only covers, 20 * 16 = 320,320 linear feet.

Calculate the number of risers required.
1. Convert height from feet to inches.
Multiply feet by 12"
12’ x 12” = 144”
2. Divide by 7”
144" / 7" = 20.57 risers
3. Subtract 1 riser for the top floor
20.57 - 1.00 = 19.57 Round up to 20 risers

Divide the length of the single top plate by the spacing of the rafters.
12' / 1' = 12
Add one for the end. 12 + 1 = 13

There are 12 months in a year and $68.50 is held each month for the government. To find the total for the year, multiply the cost
each month by 12 to represent an entire year: 12 x $68.50 = $822.

Calculating change requires subtraction. Take the money the customer gives and subtract the total bill, $50 - $16.54 = $33.46.

ake the fractions that Mark has already worked and add them together by finding a common denominator,
1/6 + 2/5 = 1(5)/30+2(6)/30 = (5 + 12)730 = 17/30.