1 Estimate the difference in the loads of two 18-wheeler trucks. One truck has a load of 39,843 pounds and the other truck has a load of 51,763 pounds. 2 First, estimate the answer using front end rounding. Then find the exact answer. There are 43,560 square feet in an acre. How many square feet are there in acres. 3 Estimate the answer using front end rounding. Then give the exact answer. A supply house purchases 3 wheelchairs at $ 1376 each and 18 speech compression recorder-players at $ 738 each. Find the total cost.
1. To estimate the difference in loads of two 18-wheeler trucks, you can round the loads to the nearest ten-thousand pounds. The load of the first truck, 39,843 pounds, would round to 40,000 pounds. The load of the second truck, 51,763 pounds, would round to 50,000 pounds. The estimated difference in loads would be 50,000 pounds - 40,000 pounds = 10,000 pounds.
To find the exact difference in loads, you can subtract the loads directly. The exact difference in loads would be 51,763 pounds - 39,843 pounds = 11,920 pounds.
2. To find the number of square feet in acres, you need to multiply the number of acres by the conversion factor of 43,560 square feet per acre.
To estimate the answer using front end rounding, you can round the number of acres to the nearest whole number. For example, let's say you have 4.8 acres. Rounded to the nearest whole number, it would be 5 acres. Then you can multiply this estimate by the conversion factor: 5 acres * 43,560 square feet per acre = 217,800 square feet.
To find the exact answer, you would multiply the number of acres by the conversion factor without rounding. For example, if you have 4.8 acres: 4.8 acres * 43,560 square feet per acre = 209,088 square feet.
3. To estimate the total cost of purchasing three wheelchairs and eighteen speech compression recorder-players, you can round the prices to the nearest hundred dollars. The price of one wheelchair, $1376, would round to $1400. The price of one speech compression recorder-player, $738, would round to $700. Then you can multiply the estimated prices by the quantities: (3 wheelchairs * $1400) + (18 recorder-players * $700) = $4200 + $12600 = $16,800.
To find the exact total cost, you would multiply the prices without rounding: (3 wheelchairs * $1376) + (18 recorder-players * $738) = $4128 + $13284 = $17,412.