In the first half of the 20th century, a strong current of racial and class prejudice supported the idea that IQ tests measured innate abili poorly because of their genetic inferiority. This development BEST reflects which of the following themes of your textbook? Select one: a. Psychology is empirical. b. Psychology is theoretically diverse. c. Psychology evolves in a sociocultural context. d. Behavior is determined by multiple causes.

You are given a \( 1.0 \mathrm{~mol} / \mathrm{L} \) solution of KOH . Using this solution, you must prepare 100 mL of a diluted solution that will have a concentration of \( 0.25 \mathrm{~mol} / \mathrm{L} \). \( \begin{array}{ll}\text { a) What volume of the initial solution should be used? } & \text { b) How much water should be added? }\end{array} \)

Respuesta: b. Un ladrillo tiene 20 cm de largo, 10 cm de anchoy 5 cm de espesor. ¿Cusnt ladrillos se necesitan para formar con ellos un bloque de 1 m ? Objetivación \( \quad \) Fórmula

20. Higher Order Thinking The weight of an elephant is \( 10^{3} \) times the weight of a cat. If the elephant weighs \( 14,00_{0} \) pounds, how many pounds does the cat weigh? How did you find the answer?

PREGUNTA 1 Al multiplicar \( 1,7 \times 0,45 \) multiplicamos \( 17 \times 45 \) y ubicamos la coma de manera que haya:

Demostrar que \( \quad 1 \cdot 2+2 \cdot 3+3 \cdot 4+\cdots+n(n+1)=\frac{n(n+1)(n+2)}{3} \)