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# Tutor profile: Imani N.

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Imani N.
Science and Math Tutor
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## Questions

### Subject:Chemistry

TutorMe
Question:

Which element in the second group is likely to be the most reactive? a) magnesium b) calcium c) beryllium d) strontium e) barium

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Imani N.

Barium is likely to be the most reactive as it is the second to last element in that group and the reactivity of the group 2 Alkaline Earth Metals generally increases as you go down. This is due to the decrease in ionization energy which leads to lower activation energy and thus faster reactions.

### Subject:Calculus

TutorMe
Question:

f(x) = 3- 5x -2x^2 ; f(7-4x)= ?

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Imani N.

f(7-4x)= 3 - 5(7-4x) - 2[(7-4x)^2)] = 3 - 35 + 20x -2(49-56x+16x^2) = 3 - 35 + 20x -98 +112x - 32x^2 =3 -35 -98 + 20x + 112x - 32x^2 = -130 + 132x - 32x^2

### Subject:Algebra

TutorMe
Question:

ln(3x - 2) = 1, then x = ?

Inactive
Imani N.

ln (3x-2) = 1 is only true if: e^1= 3x-2 [e^1 = e ] Thus: e+2= 3x ; x= (e+2)/3

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