Question

PLEASE PLEASE PLEASE HELP!!
Can someone please help me with a STEP BY STEP of this problem ? I'll seriously appreciate it, and thank you so so so much in advance!!
DON'T ANSWER IF YOU'RE UNSURE!!! I need actual help, please don't just take my points. (: Thank you!

Answer 1

10. 6/X=X/8
Cross multiply
X^2= 48
Sq rt of 48 is 6.9 miles

11. 14/X= X/8
Cross multiply
X^2= 112
Sq rt of 112 is 10.6 miles

Answer 2

1) 6.9
2) 10.6
Hope this helps!