The following questions are based on the statistical graph, shown in Hans Rowling’s 200 countries, 200 years, 4 minutes, that displays life expectancy vs wealth. In 1810 what was the general life expectancy? a. 30 years b. 40 years c. 50 years d. 60 years

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5