100 x 8 (L x H) = 800 square feet x 14 (brick per square foot) = 11,200 (brick) / 200 (brick per hour) = 56 (hours of labor) x $42.50 (labor per hour) = $2,380.

Note: m2 = sq. meter. The pebble walkway is acting like a border around the pool. There is now a larger rectangle around the pool with an additional 5 m on each side, 2.5 + 2.5 = 5. If you find the area of the larger rectangle and subtract away the area inside,
you are left with the area of the border. It is almost like cutting out the middle of the big rectangle. The area of the large rectangle is: 3,400 m2, |xw = A, 85x40 = 3,400. The area of the pool is only 2,800 m2,80 x 35 = 2,800. Subtract the two areas to find that the is 600 m2,3,400-2,800 = 600.

Replace w with 14 since the package weighs 14 ounces over 2 pounds. The formula is then $C = $2.95+$0.30 x 14. The order of operations states that multiplication is always done before addition. Multiply $0.30 by 14; $0.30 x 14 = $4.20, then add the result to $2.95; $2.95+$4.20 = $7.15.

There are 14 stairs with a ratio of 3:7. The total depth is 210 in, 14 * 15 = 210 and using a simple proportion will help find the height. 3/7 = x/10;
7x = 3(210); (7x)/7 = 630/7;x= 90.
90 inches is the same as 7.5 ft, 9°/iz = 7.5.

The first step is to find out what 4/5 is as a decimal, 4/5 = .8. A decimal can be converted to a fraction by multiplying it by 100, 8 x 100 = 80; 80%.

32 chainsaws are being delivered the next day, so 18 are still unaccounted for, 50 - 32 = 18. Calculate the percentage out of 50 that these 18 chainsaws represent, 18/50 x 100 = 36%.

The length of the plot is 60 yards. Convert this to feet by multiplying by 3. The length of the plot is 180 feet. Break this
up into 20 foot sections, since each tree must be 20 feet apart; 180/20 = 9 sections. Make a picture of the plot of land with the trees drawn in to determine the maximum number of trees. There can be a maximum of 8 trees, since each tree must be 20 feet from the edge.

1. Find the lengths and widths of the top of the retention pond:
Multiply the Depth by the Slope
(1.5 x 6 = 9) Since the pond is a rectangle, we now know that on every side of the pond there will be 9’ between the interior and the exterior.
Multiply that length by 2 to gain the full amount to add to the length and width.
(9 x 2 = 18)
Add 18 to the Length and Width of the Bottom dimensions to get the top dimensions.
Top of the Retention Pond:
L = 75 + 18 = 93
W = 40 + 18 = 58
2. Find the average length and width of the retention pond.
Add lengths of the top and bottom together and divide by 2.
75 + 93 = 168/2 = 84
Add the widths of the top and bottom together and divide by 2.
40 + 58 = 98/2 = 493
Calculate the total volume of the soil to be excavated:
V = [(Avg. L x W) x D] / 27
V = [(84 x 49) x 6] / 27
V = (4,116 x 6) / 27
V = 914.67 cu. yds.

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

To convert from a fraction to a percent, simply multiply the fraction by 100 and simplify, 3/4x 100 = 300/4 = 75%

There are 3.8 L per 1 gallon. To figure out how many liters Teresa will need for her mix, convert gallons to liters by multiplying 13 gal x 3.8 L/gal = 49.4 L.

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.

Since each shelf can hold 9 cans, divide 126 by 9; 126/9 = 14.

The guests are refunded $13.20, which means it must be subtracted from their bill, $168.50 - $13.20 = $155.30; $155. 30 is the new charge.

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)