Farmer Langa starts farming with 450 sheep. He finds that his stock increases by 12% each year. How many sheep will Langa have on his farm at the end of 5 years?

If the stock increases by 12% each year, then we'll have to multiply it by 5 to find out the increase in five years.

So,

12 x 5 = 60

Now we know that there will be an increase of 60% after 5 years. Now we will turn the percent into a decimal and multiply it by the amount of sheep (450)

So,

60/100 = 0.6

0.6 x 450 = 270

Since there is a 60% INCREASE we will add 270 to 450.

So,

450 + 270 = 720

Therefore, Langa will have 720 sheep after five years.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm