What is the length of bc, rounded to the nearest tenth? a. 13.0 units b. 28.8 units c. 31.2 units d. 33.8 units

Option C.

Step-by-step explanation:

step 1

In the right triangle ABD find the length side AB

Applying the Pythagoras Theorem

step 2

In the right triangle ABD

we know that

-------> equation A

step 3

In the right triangle ABC

------> equation B

Remember that

so equate equation A and equation B solve for DC

step 4

In the right triangle BDC find the length side BC

Applying the Pythagoras Theorem

they r 125, and 216

so the sequence goes 1,8,27,64,125,216