metalover74
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HELP PLEASE WILL GIVE BRAINIEST ANSWER!!

Evaluate the following expression when a=2 and b=5. Show your work.
(2∙a)^(b-1)





Evaluate the following expression when a=3 and b= -2. Show your work.
〖7a〗^b














What is the order of the mass of electrons from least to greatest?
12.4 x 10-3, 14 x 102, 0.013 x 103, and 157 x 10-4
a. 12.4 x 〖10〗^(-3),14 x 〖10〗^2,0.013 x 〖10〗^3,157 x 〖10〗^(-4)
b. 12.4 x 〖10〗^(-3),157 x 〖10〗^(-4),14 x 〖10〗^2,0.013 x 〖10〗^3
c. 12.4 x 〖10〗^(-3),157 x 〖10〗^(-4),0.013 x 〖10〗^3,14 x 〖10〗^2
d. 0.013 x 〖10〗^3,12.4 x 〖10〗^(-3),157 x 〖10〗^(-4),14 x 〖10〗^2

Respuesta :

Joshtray
Sorry but I can only help with the first 2.
1. Wherever you see 'a' just replace it with 2 and wherever you see 'b' just replace it with 5. That will give us [tex](2*2)^{(5-1)}=4^4=4*4*4*4=256[/tex]
2. Doing the same thing as what you did in  question 1, you will have
[tex](7*3)^{(-2)}=21^{-2}= \frac{1}{21^2}= \frac{1}{441} [/tex]
Please mark as brainliest.

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