What disadvantages do West and Central Africa's countries face when they depend on just a few exports.

Describe Rutherford's gold foil experiment. How did the experiment prove that the plum-pudding model of the atom was wrong?

A fish tank 14 in deep by 16 by 27 in is to be carried in a car that may experience accelerations as high as 6 m/s². What is the maximum water depth that will avoid spilling in rigid-body motion? What is the proper alignment of the tank with respect to the car motion?

The exercise concerns the Monty Hall problem, in which a contestant chooses one of three doors; behind one of the doors is a car, and behind the other two are goats. After the contestant chooses a door, the host opens one of the other two doors that hides a goat. (Because there are two goats, the host can open a door that hides a goat no matter which door the contestant first chooses.) The host then gives the contestant the option of abandoning the chosen door in favor of the still-closed, unchosen door. For each strategy, what is the probability of winning the car? Stay with the door initially chosen.

What factors affect the distribution of climates in this region?

What is meant by the term sales mix? What assumption is usually made concerning sales mix in CVP analysis?

The graph of $y =-\frac{1}{2}x+2$ is negative over the interval (4, ∞) and positive over the interval (-∞, 4). What happens on the graph when x = 4? Explain.

What is the equation for the parent function of a cubic equation?

Solve. $- [ - ( - k ) ] - ( - 2 ) ( - 2 + k ) = - k - ( 4 k + 3 )$

Define the terms species, population, and biological community.

Find the slope, or rate of change for each situation. Be sure to show your work.

Students are buying tickets for the fall dance. The student council keeps track of how many tickets they sell in one week.

$$\begin{array}{|l|c|c|c|c|c|} \hline {} & \text{Monday}& \text{Tuesday}& \text{Wednesday}& \text{Thursday}& \text{Friday}\\ \hline \text{Number of Tickets Sold} & 10 & 15 & 23 & 28 & 32\\ \hline \text{Amount Earned ( $\$$ )} & 50 & 75 & 115 & 140 & 16\\ \hline \end{array}$$

What is the solution of the inequality 3+|x+4|<6? (A) -13<x<5, (B) -7<x<-1, (C) -6<x<-2, (D) 1<x<7

Explain how these story elements reflect social issues facing America in the 1960s: a. The description of Elena's neighborhood; b. Eugene's mother's reaction to Elena.

A card is drawn from a deck of 52 playing cards. Find the probability that it is an Ace or a spade.