A square has an area of 16 square millimeters. What is the length of each side of the square? [free brainliest!]
2 answers:
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Answer:
C
Step-by-step explanation:
Calculate AC using Pythagoras' identity in ΔABC
AC² = 20² - 12² = 400 - 144 = 256, hence
AC = = 16
Now find AD² from ΔACD and ΔABD
ΔACD → AD² = 16² - (20 - x)² = 256 - 400 + 40x - x²
ΔABD → AD² = 12² - x² = 144 - x²
Equate both equations for AD², hence
256 - 400 + 40x - x² = 144 - x²
-144 + 40x - x² = 144 - x² ( add x² to both sides )
- 144 + 40x = 144 ( add 144 to both sides )
40x = 288 ( divide both sides by 40 )
x = 7.2 → C
Answer:
Step-by-step explanation:
We are given that
By ohm's law
R=389 ohm
I=0.03 A
We have to find rate of change of current I means
Differentiate the equation w.r.t t
Substitute the values then we get
Hence, the current I is changing at the rate=-0.00016A/s