Which number in written in scientific notation? (big points reward)

a: 7.8 x 10^-5
b: 3.2 x 100^2
c: -5 x 10^-12
d: 0.84 x 10^6

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step-by-step explanation:

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step-by-step explanation:

2 tens + 6 ones

1 ten + 16 ones

0 tens + 26 ones

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

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