a. What is the largest climatic feature in Africa? b. Why does most of Africa have high temperatures? c. What are the different kinds of vegetation growing in Africa?

Which type of object visible from Earth orbits the sun and has cleared the area of its orbit? A. star B. planet C. moon D. meteor

You rub a clear plastic pen with wool, and observe that a strip of invisible tape is attracted to the pen. Assuming that the pen has a net negative charge, which of the following could be true? Select all that apply. (1) The tape might be negatively charged. (2) The tape might be positively charged. (3) The tape might be uncharged. (4) There is not enough information to conclude anything.

What is the evidence for a liquid water ocean on Europa, and why is this interesting to scientists searching for extraterrestrial life?

A warehouse is 60 yards long, 30 yards wide, and 6 yards high. What is the area of the warehouse floor? If the warehouse is filled to half its height with tightly packed boxes, what is the volume of the boxes?

Perform the required operation.The escape velocity required to overcome the gravitational pull of a planet or star is $v_{\mathrm{csc}}=\sqrt{\frac{2 G M}{R}} .$ Write this equation with a rationalized denominator.

A January 2007 Gallup Poll question asked, "In general, do you think things have gotten better or gotten worse in this country in the last five years?" Possible answers were “Better”, "Worse”, "No Change", “Don't Know”, and “No Response". What kind of variable is the response?

Solve each system of equations. If the system has no solution, say that it is inconsistent.

$$\left\{\begin{array}{c}{\frac{1}{2} x+y=-2} \\ {x-2 y=8}\end{array}\right.$$

On a separate sheet of paper, explain the following term by using it correctly in a sentence. reincarnation

What is the difference between life expectancy and life span? Why are they different?

Write each number in scientific notation. 0.00421

A store has a special on bread with a five-loaf limit. The probability distribution for sales is listed in the following table. Find the average number of loaves per customer.

$$\begin{matrix} \text{Number of Loaves per Customer} & \text{Probability}\\ \text{0} & \text{0.05}\\ \text{1} & \text{0.20}\\ \text{2} & \text{0.15}\\ \text{3} & \text{0.20}\\ \text{4} & \text{0.25}\\ \text{5} & \text{0.15}\\ \end{matrix}$$

Determine whether each integral is convergent or divergent. Evaluate those that are convergent.

$$\int _ { 0 } ^ { \infty } s e ^ { - 5 s } d s$$

Compare: 500 * 1 _ 500 $\div$ 1