The smallest number by which 28 should bemultiplied so as to get a perfect square isO2O 40307
Mathematics · High School · Thu Jan 21 2021
Answered on
Determine the smallest number by which 28 should be multiplied to get a perfect square.
Choices:
2, 4, 3, 7
Solution:
In order to determine the number by which 28 should be multiplied to get a perfect square, we simply multiply 28 by each number, then take its square root.
= (28)(2)
=√ 56
= 7.48
= (28)(4)
=√112
=10.58
= (28)(3)
=√84
= 9.16
= (28)(7)
= √196
= 14
Hence only 7 results to a perfect square since when we took the square root of the number, the answer is a while number, not a decimal.
Final answer:
= 7