A certain star is 4.3 × 10^2 light years from Earth. One light year is about 5.9 × 10^12 miles. How far from Earth (in miles) is the star? Express your answer in scientific notation.

Estimate 0.037854921 to the nearest hundredth. Express your answer as a single digit times a power of ten.

A certain star is $4.3 \times 10^2$ light years from Earth. One light year is about $5.9 \times 10^{12}$ miles. How far from Earth (in miles) is the star? Write your answer in scientific notation.

A certain star is 10.6 light-years away. How long would it take a spacecraft traveling 0.960 c to reach that star from Earth, as measured by observers: on the spacecraft?

Define the term risk behavior.

If n > 0, then -|n| = _

The mass of one oxygen molecule is $5.3 \times 10^{-23}$ gram. Find the mass of 20,000 molecules of oxygen. Express the answer in scientific notation.

A utility company charges a base rate for water usage of $19.50 per month, plus$4.58 for every additional 1000 gal of water used over a 2000-gal base. (A) Write a formula for the monthly charge C for a household that uses n thousand gallons over the 2000-gal base. (B) Compute the cost for a family that uses a total of 6000 gal of water for a given month.

Find the general term of an arithmetic sequence given that $u_{7}=31$ and $u_{15}=-17.$ Hence, find the value of $u_{34}.$

Consider the point T(3, -1, 4). Find $\overrightarrow{\mathrm{OT}}$.

Joelle has a personal web page with 60 gigabytes of memory (approximately 6 x 10^10 bytes). She stores math videos on the site for her students to watch outside of class. If each video requires an average of 5 megabytes of memory (approximately 5 x 10^6 bytes), how many videos can she store on her website?

What is the name for the felt-covered dwellings of Central Asia's nomads?

A utility company charges a base rate for water usage of $19.50 per month, plus$4.58 for every additional 1000-gal of water used over a 2000-gal base. a. Write a formula for the monthly charge $C$ for a household that uses $n$ thousand gallons over the 2000-gal base. b. Compute the cost for a family that uses a total of 6000-gal of water for a given month

Summarize Write an objective summary of the text one that is free from opinion and evaluation.