Answer:
98
Step-by-step explanation:
1) You shulduse the formula x^2-y^2= (x-y)(x+y)
That obvious, that 9.9 is considered as x, and 0.1 as y
2) So 9.9²- 0.1²= (9.9-0.1) * (9.9+0.1)=9.8*10=98
hosta=11 ivy=9
Logically thinking... $20 for 1 h and 1 i
So I would say $11 H and $9 I
16.8ft !
7.2 + 9.6 = 16.8 ft .
