Use technology to construct the confidence intervals for the population variance \( \sigma^{2} \) and the population standard deviation \( \sigma \). Assume the sample is taken from a normally distributed population. \( \mathrm{c}=0.98, \mathrm{~s}^{2}=10.89, \mathrm{n}=27 \) The confidence interval for the population variance is ( \( \square, \square \) ). (Round to two decimal places as needed.) The confidence interval for the population standard deviation is \( (\square, \square) \) (Round to two decimal places as needed.)

Question 9 You want to be able to withdraw \( \$ 40,000 \) each year for 30 years. Your account earns \( 6 \% \) interest. a) How much do you need in your account at the beginning? b) How much total money will you pull out of the account? \( \$ \) c) How much of that money is interest? \$

1. Evaluate the expression \( \frac{3 a+2 b}{2} \) when \( a=-3 \) and \( b=-4 \). A) \( -\frac{1}{2} \)

18. Un diseñador elabora el boceto de una boeta como se imuestra en la Figura, recortando un cuarto de circurferencia en cada verrice de un cuadrado con un lado de 12 cm . Si se colocan dos de estas losetas en Fila, icuál es el perimetro, en centimetros, de la figura que se farma?

10. El patio de la casa de Pedro tiene 12 m . de ancho \( y \) el doble de largo. Calcula su superficie utilizando potencias.

PATIO 8