A communications satellite is in a circular orbit above the earth such that it always remains directly over a point on the earth’s surface. As a result, the period of the satellite must equal the rotation of the earth, which is approximately 24 hours. Determine the satellite’s altitude h above the earth’s surface and its orbital speed.

In the sentence below, underline the subordinate clause. Above each subordinate clause, write ADJ if the clause functions as an adjective or ADV if the clause functions as an adverb.

The Internet, which is a network connecting many computers using a common communications protocol, was once used mostly by academics.

Assume a target income of 12% of average invested assets. Compute residual income for each division.

Hargray Communications offered a bundled package of television cable, broadband Internet, and basic telephone service for $\$ 99.99$ for the first $3$ months. If the company expects that $1 \%$ of the viewers of the ad will purchase the service, what is the probability that at least $120$ of $11,000$ viewers of the ad will make the purchase?

A communications company offers a variety of calling card options. Card A has a 300 cents connection fee and then costs 2 cents per minute. Card B has a 10 cents connection fee and then costs 6 cents per minute. Find the length of the call that would cost the same with both cards.

Calculate the orbital speed for a near-Earth orbit, which must be provided by the launch rocket. (The advantages of near-Earth communications satellites include making the signal delay unnoticeable, but with the disadvantage of having to track the satellites actively and having to use many satellites to ensure that at least one is always visible over a particular region.)

A function commonly used in communications textbooks for the tail probabilities of Gaussian random variables is the complementary error function, defined as $\operatorname{erfc}(z)=\frac{2}{\sqrt{\pi}} \int_{z}^{\infty} e^{-x^{2}} d x$. Show that $Q(z)=\frac{1}{2} \operatorname{erfc}\left(\frac{z}{\sqrt{2}}\right)$.

Define (a) sensitivity analysis, (b) scenario analysis, and (c) simulation analysis. If GE were considering two projects (one for $500 million to develop a satellite communications system and the other for$30,000 for a new truck), on which would the company be more likely to use a simulation analysis?

Use the following ticker information to answer. The stock symbols represent the following corporations: HD, Home Depot Inc.; S, Sprint Corp; VZ, Verizon Communications Inc.; and XOM, Exxon Mobil Corp.

$$\mathrm{HD}\ 32.3 \mathrm{M} @ 126.26 \Delta 1.13\ \mathrm{S}\ 1.1 \mathrm{K} @ 3.33 \nabla 0.78\ \mathrm{VZ}\ 3.32 \mathrm{K} @ 51.02 \Delta 2.27\ \mathrm{XOM}\ 0.66 \mathrm{K} @ 81.75 \nabla 1.58$$

Phil sold his shares of Verizon Communications Inc., as indicated on the above ticker. What was the total value of all the shares Phil sold?

Choose the letter of the term that best completes each sentence.

a. transform

b. transmit

c. recover

d. identical

e. despite

f. manipulate

g. appropriate

h. ethnic

One can $\underline{\phantom{\text{justekst}}}$ messages around the world in an instant using satellite communications and the Internet.

a. Why were the scientific developments of the $1500$s and the $1600$s later called the Scientific Revolution?

b. What did the work of Calileo, Newton, Vesalius, van Leeuwenhoek, and Lavoisier have in common?

c. How did communications advances contribute to learning, discovery, and new scientific methods in Europe?

Metzler Communications designs and programs a website for a local business. Metzler charges $46,000 for the project, and the local business signs an 8% note January 1, 2019.

Required:

Prepare Metzler’s journal entry to record the cash received to pay off the note and interest on October 1, 2019.

Decline in Land-Line Phones. The number of land-line phones in the United States has decreased from 191 million in 2001 to 172 million in 2006 (Source: Federal Communications Commission). Find the average rate of change in the number of land-line phones over the 5-yr period.

Electronic communications, part 2. Look again at the data in electronic communications.

a) If we select a respondent at random, what's the probability that we select a person earning less than $\$ 50 \mathrm{~K}$ and responded "somewhat"?

b) Among those earning $\$ 50-99.9 \mathrm{~K}$, what is the probability that the person responded: "not at all"?

c) What's the probability that a person who responded "very much" was earning at least $\$ 100 \mathrm{~K}$?

d) If the person responded "very much," what is the probability that they earn between $\$ 50 \mathrm{~K}$ and $99.9 \mathrm{~K}$?

e) Are the answers to the question and income level independent?