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Katie wants to plant a square lawn in her front yard. She has enough sod to cover an area of square feet. To the nearest tenth of a foot, how long can a side of her square lawn be?
19.2 feet
Sergio wants to make a square mosaic as an inlay for a table he is building. He has enough tile to cover an area of square centimeters. How long can a side of his mosaic be?
52 centimeters
Another application of square root s involves gravity . On Earth, if an object is dropped from a height of feet, the time in seconds it will take to reach the ground is found by evaluating the expression For example, if an object is dropped from a height of feet, we can find the time it takes to reach the ground by evaluating
| Take the square root of 64. | |
| Simplify the fraction. |
It would take seconds for an object dropped from a height of feet to reach the ground.
Christy dropped her sunglasses from a bridge feet above a river. How many seconds does it take for the sunglasses to reach the river?
| What are you asked to find? | The number of seconds it takes for the sunglasses to reach the river |
| Write a phrase. | The time it will take to reach the river |
| Translate to an expression. | |
| Evaluate when . | |
| Find the square root of 400. | |
| Simplify. | |
| Write a sentence. | It will take 5 seconds for the sunglasses to reach the river. |
A helicopter drops a rescue package from a height of feet. How many seconds does it take for the package to reach the ground?
9 seconds
A window washer drops a squeegee from a platform feet above the sidewalk. How many seconds does it take for the squeegee to reach the sidewalk?
3.5 seconds
Police officers investigating car accidents measure the length of the skid marks on the pavement. Then they use square roots to determine the speed, in miles per hour, a car was going before applying the brakes. According to some formulas, if the length of the skid marks is feet, then the speed of the car can be found by evaluating
After a car accident, the skid marks for one car measured feet. To the nearest tenth, what was the speed of the car (in mph) before the brakes were applied?
| What are you asked to find? | The speed of the car before the brakes were applied |
| Write a phrase. | The speed of the car |
| Translate to an expression. | |
| Evaluate when | |
| Multiply. | |
| Use your calculator. | |
| Round to tenths. | |
| Write a sentence. | The speed of the car was approximately 67.5 miles per hour. |
An accident investigator measured the skid marks of a car and found their length was feet. To the nearest tenth, what was the speed of the car before the brakes were applied?
42.7 mph
The skid marks of a vehicle involved in an accident were feet long. To the nearest tenth, how fast had the vehicle been going before the brakes were applied?
54.1 mph
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