Choice A is correct
BC=DC
the two triangles share one angel C
the two triangles each have a right angle
so they are congruent according to Angle-Side_Side Theorem
Answer:
6.4347826087
Step-by-step explanation:
one mole of water contains 6.02 x 1023 MOLECULES of water. But each molecule of water contains 2 H and 1 O atom = 3 atoms, so there are approximately 1.8 x 1024 atoms in a mole of water.
I assume you're asking to solve for the n-th term in the sequence,
.
From the given recursive rule,

and by substitution,

Similarly,


The pattern continues, so that we can write the n-th term in terms of the 1st one:

So the first few terms of the sequence are
{10, 12, 14, 16, 18, 20, …}