8. The population of a town increasing \( 9 \% \) per year. If the population of this town in 2008 was \( 20,00,000 \), then find the population in 2010 . Uma obtained 65 marks in Maths. If she obtained \( 75 \% \) of total marks in Maths. Find the total marks.

Example 35820 g of marble contuining \( 90 \% \mathrm{CaCO}_{3} \) is allowed to react with 50 g of a concentrated acid containing \( 36.5 \% \) HCI by mass. Find the (a) limiting reactant (b) number of moles of excess reagent left over unreacted (c) mass of salt in gram (d) volume of \( \mathrm{CO}_{2} \) gas liberated at NTP. Solution

\( (-2 ;-3) \) y \( (5 ; 3) \)

5. Escriban un polinomio que cumpla con las condiciones dadas. a) Un trinomio de grado 3 , cuyo coeficiente principal sea 2 el termino independiente - 4

\( \left. \begin{array} { | c | c | c | c | c | } \hline b & { - a } & { a } & { a + b } & { a + ( b ) } \\ \hline \frac { 5 } { 8 } & { \frac { 1 } { 12 } } & { \frac { - 7 } { 12 } } & { } \\ { } & { } \end{array} \right. \)

Determinez sila serie suivante est Converge ou diverge \( \sum_{n=1}^{\infty} \frac{(-1)^{n+1}}{n} \)