I'm pretty sure you're supposed to use Pythagorean Theorem, so here goes:
a^2+b^2=c^2
=8^2+b^2=10^2
=64+b^2=100
=b^2=100-64
=b^2=36
=b=6
So, AD=6
Then, 6*2=12
AC=12cm
0.05x+0.12 (19660-x)=2060
Solve for x
X=4274.29 at 5%
19,660−4,274.29
=15,385.71 at 12%
Answer: almsot 100% sure x= 30
Mean=11.3
Median=11
Mode= no
>>>>>>>>>>>Range=17 <<<<<<<<<<<
>>>>>>>>>>>D)Range <<<<<<<<<<<<