7.) Old McDonald wants to build a fence around his
farm. If the area of his farmland is 400 square meters,
what would the perimeter of the fence be?
200 feet
20 feet
40 feet
80 feet(my answer)
8.) 8) A square has an area of 29 square units.
Which is the best estimate of the side length of the
square?
More than 5 units but less than 6 units
More than 7 units but less than 8 units
More than 14 units but less than 15 units(my answer)
More than 25 units but less than 36 units
7. correct
8. area = 29
side = √29 which is between 5 and 6
since 5^2 = 25 and 6^2= 36 , and your 29 falls between those two
Thank you sooo much!!! @Reiny
7.) To find the perimeter of a square fence around Old McDonald's farmland, we need to find the length of each side first. The formula for the area of a square is side length squared (A = s^2).
Given that the area of the farmland is 400 square meters, we can solve for the side length (s).
400 = s^2
Taking the square root of both sides, we get:
s = √400
s = 20
Since a square has four equal sides, the perimeter of the fence would be:
Perimeter = 4s = 4 * 20 = 80 feet
Therefore, the correct answer is 80 feet.
8.) To estimate the side length of the square, we need to find the square root of the area.
Given that the area of the square is 29 square units, we can estimate the side length (s) by finding the square root of 29.
√29 is between 5 and 6.
Therefore, the best estimate of the side length of the square is more than 5 units but less than 6 units.
So, the correct answer is more than 5 units but less than 6 units.
7) To find the perimeter of the fence, we need to determine the length of each side of the square farm. Since we know the area of the farm is 400 square meters, we can find the length of one side by taking the square root of the area.
The square root of 400 is 20, so each side of the farm is 20 meters long. Since the fence goes around all four sides of the farm, we need to calculate the perimeter by adding up the lengths of all four sides.
The perimeter of a square is found by multiplying the length of one side by 4. Therefore, the perimeter of the fence would be 20 meters * 4 = 80 meters. Hence, the correct answer is 80 feet.
8) To find the side length of the square, we need to find the square root of the area. In this case, the area is 29 square units. We can estimate the square root value by looking at the given options.
The square root of 25 is 5, and the square root of 36 is 6. Therefore, the best estimate for the side length of the square would be between 5 and 6 units. None of the given options fall within this range. However, we can select the closest option, which is "More than 25 units but less than 36 units". Hence, the correct answer is "More than 25 units but less than 36 units".