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caden8233
26.02.2020 •
Mathematics
I need all of these answers with work shown and/or explained, please help..
1. -(5)^-1
-1/5
3. -1/y^-4
-y^4
4. 5 ^ 4 x 5^7
5^11
7. (5t ^ 3)^-4
1/625t^12
12. What is the order of 4 x 10^-7, 7 x 10^-9, 1 x 10^4, 2 x 10^4
7 x 10^-9, 4 x 10^-7, 1 x 10^4, 2 x 10^4
13. Find the simplified form of the expression. Give your answer in scientific notation
(8 x 10^4)(9 x 10^-8)
7.2 x 10^-3
14. Astronomers measure long distances in light-years. One light year is the distance that light can travel in one year, or approcimately 5.88 x 10^12 miles. Suppose a star is 9.8 x 10^1 light-years from Earth. in scienctific notation, approximately how many miles is it?
5.76 x 10^14 miles
15. A dinosaur fossil is 91,910,000 years old. How canyou express this age in scientific notation with the highest level of precision?
9.191x10^7
16. Radio signals travel at a rate of 3 x 10^8 meters per second. How many seconds would it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.6 x 10^7 meters? (Hint: Time is distance divided by rate.)
1.2 x 10^-1
18. Does the rule y=6x^7 represent an exponential function?
no
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Ответ:
82.555
Step-by-step explanation: I used a calculator