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darkb0nebeauty
Ultraviolent rays, which cause sun burn by penetrating only the top level of kin, have a wavelength about 1000 times the wavelength of an X-ray. Find the wavelength of ultraviolent rays. Show your work.
Medical X-rays, with a wavelength of about 10 ^-10m, can penetrate completely through you skin.
can u help me...
Why don't you just multiply the wavelength of an X-ray with 1000 in order to get the wavewength of a UV ray?
Not sure, but sounds like that it is only that.
beside we know that X-rays have a wavelength on about 100 nano meter.. if we take 10^-10 meter and convert to nano meters.. we get 0.1 nm. Multiply that with 1000 and you get 100 nm.
ok so 10^-10m * 1000
if I had to guess, yes. Because we know the multiplication factor and one of the wavelengths. However if I were you I would calculate in nano meters. nano = 10^-9
ok this wat i got = 1000000000000
wait.. how did you get that huge number?
i got t bye mulitplyn 10^-9*1000
I doubt that. Lets do it in the head: \[10^{-9}*1000=10^{-9}*10^{3}=10^{-9+3}=10^{-6}\]
oh ok so the answer is 10^-6
it was not 10^-9 but 10^-10
\[10^{-10} m*1000=10^{-10} m *10^{3}=10^{-10+3} m=10^{-7} m\] \[10^{-7} m * 10^{9} \frac{ nm }{ m }=100 nm\]
so 100nm is that right
Yes 100 nano meters :)
I think. not 100% sure if the procedure is right... seems to esay for some reason.
ok so 100nm, can you help me with another one
Just post it then I might take a look :)
I ment as a question :)
Consider the sequence 2, 6, 18, 54…. Let n= the term number in the sequence. Let A (n) = the value of the nth term of the sequence. 4. What is the common ratio of the sequence? Common ratio: 5. Complete each statement. a. A (1) =2=2*3^? b. A (2) =6=2*3=2*3^? c. A (3) =18=2*3*3=2*3^? d. A (4) =54=2*3*3*3=2*3^? 6. What is the relationship between the exponent of the base 3 and the value of n? 7. Complete the statement: A (n) = 2*3^?
Hmmm I think you need to post this as a seperate question, not sure I fully understand the question.
Activity 2 Consider the sequence 2, 6, 18, 54…. Let n= the term number in the sequence. Let A (n) = the value of the nth term of the sequence. 4. What is the common ratio of the sequence? Common ratio: 5. Complete each statement. a. A (1) =2=2*3^? b. A (2) =6=2*3=2*3^? c. A (3) =18=2*3*3=2*3^? d. A (4) =54=2*3*3*3=2*3^?
I just ment i don't understand the way they put it... I'm not from the US so I have to translate the words back and forth, and when I do so I get something that don't make sence. All I can say is that you can discribe your function/seq as this: A(n)=2*3^n, n belongs to all whole positive numbers.
ok, is that is that all you get. @Frostbite wat bout you @aspenfields
im just thinking and trying to figure it out atm
haye ca you put that work back to the first one please...@Frostbite
ok while we are waitin for that one can u help me with this other one...please!!!
A. What is the common ratio of the sequence 80, 20, 5, 5/4…? Common ratio: B. What are the next three terms in the sequence? Next three terms:
haye can you please help.... @skullpatrol
ok are you going tew help me on the first one or the next three term, but with the first one o idea and the second one i do i have 1 idea
What number do you need to multiply by 80 to get 20?
you cant muliply anything by 80 to get 20 but 20*4 is 80
How about $$\frac{1}{4}$$
oh so 80 tmes 1/4 is 20
$$80*\frac{1}{4}=20$$
oh ok so 20*1/4=5
thanks so much ok so can you help me on the other one now.... the first one or do you want me to post it up there
wait can you help me on the next three terms
Just keep multiplying by 1/4...
ok is the next term 5/16, then 5/64, then 5/256
are yall still there.@skullpatrol @tayluvsya
so i did it right. ok so can you help me on the first one
i really dont get so can you please help me
What was the question?
Activity 2 Consider the sequence 2, 6, 18, 54…. Let n= the term number in the sequence. Let A (n) = the value of the nth term of the sequence. 4. What is the common ratio of the sequence? Common ratio: 5. Complete each statement. a. A (1) =2=2*3^? b. A (2) =6=2*3=2*3^? c. A (3) =18=2*3*3=2*3^? d. A (4) =54=2*3*3*3=2*3^?
What do you have to multiply 2 by to get 6?
so all of them are three is that alright
Just like multiplying by 1/4 each time.
ok that i dont get can you please help me i have to turn this in before 12:30
To get the next term multiply by 3
so a. 6 b.18 c.54 d. 162 is that right
The whole idea behind these type of questions is to answer: "what do I need to multiply by to get the next term"? and then continue using that number.
so what i got up there are those the right answers....
ok i have 3 more
actually it comes along with it, look back up with the one we just worked out and it says the common ratio, is the ratio times 1/4 or what
haye wat happened @skullpatrol