40 tens is basically 40 times 10 so 400
which is 4 hundreds
a) 3.8-10= -6.2 cm that's you're answer-6.2 cm
b) -6.2+10=16.2 that's you're answer 16.2 cm
They are building blocks of geometry
Chord because the radius is the center of the circle to a side and diameter is the length across a circle through the center point so chord is the correct answer! I hope this helps! :)
$50-x=n
x=50-n
need more info you need to let me know what xis