If the demand function is where \( P \) and \( Q \) are the price and quantity respectively, determine the point price elasticity of demand if \( P=10 \). Is demand elastic or inelastical this price? a. \( -0,2 \) inelastic b. \( -0,008 \) inelastic c. None of the given options is correct. d. \( -0,8 \) elastic e. \( -2,5 \) elastic

4) Modélisation du bénéfice : Soit \( b \) la fonction définie sur \( [1 ; 5,5] \) par : \( \quad b(x)=a(x)-c(x) \). a) Que représente \( b(x) \) ? b) Calculer et simplifier \( b(x) \). c) Pour quels prix de vente unitaire d'un séjour l'agence réalisera-t-elle un bénéfice ? On pourra utiliser la calculatrice graphique pour répondre à cette question.

Who can save money to buy a house?

You deposit \( \$ 1000 \) each year into an account earning \( 3 \% \) interest compounded annually. How much will you have in the account in 25 years? \( \$ \)

posited \( \$ 3400 \) into a savings account \( 0.2 \% \). Find the amount in the savings

A family has a monthly income of \( \$ 3100 \) and plans to spend \( 7 \% \) of this amount on entertainment. How much will be spent on entertainment? The family will spend \( \$ \square \) on entertainment.