# Math

Radio signals travel at a rate of 3x10^8 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 3.6x10^7 meters?

A. 8.3 seconds
B. 1.2x10^-1 seconds
C. 1.08x10^16 seconds
D. 10.8x10^15 seconds------

Not sure if im correct can someone check my answer?

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1. No, that's how far it will travel in 3.6x10^7 seconds
distance = speed * time

You want the time, so divide distance by speed
3.6x10^7 / 3x10^8 = 1.2x10^-1

Note also that if you had been correct with D, that is not scientific notation, since the number must be less than 10. C and D are the sama value, but only C is scientific notation.

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2. Thanks oobleck

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3. You guys are wrong!!

I just took the test and it is B.

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4. F4rt bucket agrees with guy above

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5. anonymous is right it's b

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6. 1A
2A
3A
4A
5A
6B
7C
8A
9B
10C
11A
12A
13B
14D
15B
16B
17A
18B
19??
20??
21A
22??
23B
24B
this will give you a 87 it's not perfect but adleast you pass... sorry

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7. 1.A
2.D
3.A
4.A
5.A
6.B
7.C
8.A
9.C
10.C
11.C
12.C
13.D
14.C
15.A
16.B
17.yes
18.no
19.C
20.A
21.B
22.B
23.B
24.B
I took the test and checked the answers after and this is what i got its 100 percent.

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8. yall know that posting the letter isnt helpful because the answer could be the same its just that teachers might switch up the letter combos

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9. Ikr, the answer to my first one is - 1/6 and is C. The question is -(6)^-1

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10. what kind of hub for cheaters have I stumbled upon?

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11. U3 L9 Exponents and Exponential Functions Unit Test

1. - 1/10
2. 1
3. - y ^ 4
4. 5 ^ 11
5. 25
6. q ^ 18
7. 1/(1, 296q ^ 24)
8. - 11/2
9. x ^ 21
10. 16/(49y ^ 10)
11. Yes the number is written in scientific notation.
12. 1.4 * 10 ^ - 2, 1.4 * 10 ^ - 1, 1.5 * 10 ^ 3, 2 * 10
13. 2.4 * 10 ^ 3
14. 1.31 * 10 ^ 15
15. 9.191 * 10 ^ 7
16. 1.2*10^ -1 seconds
17. Yes
18. No
19. A
20. B
21. 750 pounds
22. B
23. 4,862.03
24. \$8,437.76

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12. @guardian angel
idk what test tou got but all those questions are completely difrent from mine

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13. unit 2, lesson 9: exponents and exponential functions unit test for california connections academy

** these were the correct answers for the test that i took, apologies if it's not correct for your test **

** i start giving the letter answers with the word and scientific notation problems, the equations have the answer after the equal sign **

1) -(5)^-1 = -1/5

2) (-8.3)^0 = 1

3) -1/y^-4 = -y^4

4) 4^6(4^3) = 4^9

5) (3)^10(3)^-9 = 3

6)(t^8)^2 = t^16

7) (5t^3)^-4 = 1/625t^12

8) what is the value of 12x^-3y^-1 for x = -1 and y = 5?
a) -12/5

9) (y^-5)^-10y^10 = y^60

10) (4/7y^5)^2 = 16/49y^10

11) determine if the number is written in scientific notation. if not, explain 2.01 x 10^-5 .
c) yes; the number is written in scientific notation

12) what is the order of 4 x 10^-7 , 7 x 10^-9 , 1 x 10^4 , 2 x 10^4 from least to greatest?
c) 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)
b) 7.2 x 10^-3

14) astronomers measure large distances in light-years. one light-year is the distance that light can travel in one year, or approximately 5.88 x 10^12 miles. suppose a star is 3.2 x 10^2 light-years from earth. in scientific notation, approximately how many miles is it?
d) 1.88 x 10^15

15) a dinosaur fossil is 92,170,000 years old. how can you express this age in scientific notation with the highest level of precision?
b) 9.217 x 10^7

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 3.6x10^7 meters? (hint: time is distance divided by rate.)
b) 1.2 x 10^-1 seconds

17) does the table represent an exponential function?
x: 1 | 2 | 3 | 4 a) yes
y: 4 |16| 64 | 256

18) does the rule y = 6x^7 represent an exponential function?
b) no

19) choose the correct graph of the function y = -8(2^x)
a) the graph with a downward trend curve on the left bottom corner

20) choose the correct graph of the function y = 1/5(3^x)
b) the graph with an upward trend curve that goes from the left top
corner to the right top corner

21) in an appropriate environment guppies reproduce at an astounding rate. a population of breeding guppies doubles every 2 months. how many guppies will there be after 6 months if the beginning population is 180 guppies?
a) 1,440 guppies

22) mark raises guppies in an aquarium. he finds out that guppies reproduce very rapidly and the number doubles every month. He starts out with 10 guppies, and the function y = 10(2^x) models the number of guppies he will have after x months. which graph represents this function?
b) the graph with a positive curve trend. there are two graphs with a
positive cure trend, the answer for this question is the graph with a
larger positive curve trend.

23) a \$3,300.00 principle earns 4% interest, compounded annually. after 3 years, what is the balance in the account?
a) 3,712.05

24) a boat costs \$92,000.00 and depreciates in value by 15% per year. how much will the boat be worth after 10 years?
a) \$18,112.45

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14. they change the questions guys ABCD dosent work on tests.

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15. the questions even change a little.
for 16 i got:
Radio signals travel at a rate of 3 × 108 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 9.6 × 106 meters? (Hint: Time is distance divided by rate.)
A. 3.2 × 102 seconds
B. 3.2 × 10–2 seconds
C. 3.13 × 101 seconds
D. 2.88 × 1015 seconds

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16. Good luck my guys.

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17. 1.-1/5

2. 1

3. -y^4

4. 4^9

5. -4

6. t^16

7. 1/27t^15

8. -13/4

9. t^38

10. 16/49y^10

11. yes

12. 3 x 10^-9 7 x 10^-5 5 x 10^4

13. 2.4 x 10^3

14. 1.31 x 10^15

15. 9.355 x 10^7

16. 1.4 x 10^-1 seconds

17. yes

18. no

19. The one with the arrow curving down on the 3rd quadrant.

20. The one with the arrow curving up on the 1st quadrant.

21. 4000 bacteria

22. A. The one with the arrow going up but not as straight up as the other one.

23. \$7,503.40

24. \$8,437.76

100% you GUYS! Make sure You ACE your grades! And get through school at all costs!

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18. I can confirm that "I got You GUYS!" is 100%!! correct

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19. @i g0T u Br0 ^-^
what did u get

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21. 1. 1/6
2.144x18y20
3.c12
d4
4.1440
5.Planet B;Planet D;Planet A;Planet C
6.Atom B;AtomA;AtomC;AtomD
7. 3.05x10 9m3
8. 3
9.1.5 x10 12
10.2.4x10 1
12. x21
13. 1.2 x10 - 1 seconds
14. 16
49y 10
15. 10,000 y16
t 16
16. Yes
17.no
18. D
19. B
20. D
21. B
22. 289
23. \$3,712.05
24. \$6,349.06
25. \$9,827.07

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