I need to know what the square root of 280 is
The Correct Answer and Explanation is:
he square root of 280 is approximately 16.7332.
Explanation:
To find the square root of 280, we want a number that, when multiplied by itself, equals 280.
Step 1: Understand the square root
The square root of a number xxx is a value yyy such that:y2=xy^2 = xy2=x
In this case, we want yyy where:y2=280y^2 = 280y2=280
Step 2: Factorize 280 (optional but useful)
Breaking down 280 into its prime factors can help simplify the root if possible:280=2×2×2×5×7=23×5×7280 = 2 \times 2 \times 2 \times 5 \times 7 = 2^3 \times 5 \times 7280=2×2×2×5×7=23×5×7
Since square roots simplify perfectly only with pairs of primes, here we have:
- A pair of 2s (from 23=2×2×22^3 = 2 \times 2 \times 223=2×2×2)
- A single 2 leftover
- One 5 and one 7
Extracting the perfect square part:280=23×5×7=(22)×2×5×7=4×70=4×70=2×70\sqrt{280} = \sqrt{2^3 \times 5 \times 7} = \sqrt{(2^2) \times 2 \times 5 \times 7} = \sqrt{4 \times 70} = \sqrt{4} \times \sqrt{70} = 2 \times \sqrt{70}280=23×5×7=(22)×2×5×7=4×70=4×70=2×70
Step 3: Approximate 70\sqrt{70}70
To get a decimal:
- 82=648^2 = 6482=64
- 92=819^2 = 8192=81
So, 70\sqrt{70}70 is between 8 and 9.
Using a calculator or estimating more precisely:70≈8.3666\sqrt{70} \approx 8.366670≈8.3666
Therefore,280=2×8.3666=16.7332\sqrt{280} = 2 \times 8.3666 = 16.7332280=2×8.3666=16.7332
Why does this matter?
Understanding how to calculate square roots is fundamental in many areas of math, science, and engineering. It’s used in geometry for finding side lengths, in statistics for standard deviations, and in physics for various formulas involving distances and speeds.
Methods of calculating square roots:
- Estimation: Use perfect squares near the number.
- Prime factorization: Helps simplify the root for exact forms.
- Calculator: Gives precise decimal results.
- Long division method: Manual algorithm to find square roots digit by digit.
Summary:
- The exact simplified form is 2×702 \times \sqrt{70}2×70.
- The approximate decimal form is 16.7332.
- This result means that 16.7332×16.7332≈28016.7332 \times 16.7332 \approx 28016.7332×16.7332≈280.
