1
x1=1
2
x 2 = 4
3
x 3 = 9
4
x4 = 16 The next number is the bold 4 on this line.
Answer:
184 
Step-by-step explanation:
Surface area =
· h / 3
Surface area = 55.2 · 10 / 3
Surface area = 552/3
Surface area = 184
Final answer: 184 
P=present value of investment = 2800
i=interest per quarter=0.07/4=0.0175
n=number of quarters money invested (to be calculated)
Interest = P[(1+i)^n-1]=500
2800((1+0.0175)^n-1)=500
(1+0.0175)^n=500/2800+1
take log on both sides
n(log(1.0175)=log(1+500/2800)
n=log(1+500/2800)/log(1.0175)
=9.471 quarters
=37.88 months
=37.9 months [ nearest tenth of a month ]
Time = 6hours
Distance = 38.4 Km
Speed = distance /time
= 38.4/6
= 6.4 km/h