Which number is written in scientific notation? a.4.5*10^-3 b.14.5*10^2 c.0.78*10^-6 d.5.7*4^8

Option A is correct, i.e. 4.5*10^-3

Step-by-step explanation:

To write scientific notations:-

1. The first digit should be non-zero.

2. The decimal representation should be a number greater than 1 and less than 10.

3. The exponent representation should be in form of 10's power.

Checking given options:-

B. 14.5*10^2

Given option B has decimal representation greater than 10, so it is NOT correct.

C. 0.78*10^-6

Given option C has decimal representation less than 1, so it is NOT correct.

D. 5.7*4^8

Given option D has exponent representation NOT in form of 10's power, so it is NOT correct.

Checking option A:- 4.5*10^-3

Given option A has decimal representation between 1 and 10. Also it has exponent representation in form of 10's power.

Hence, option A is correct, i.e. 4.5*10^-3

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step-by-step explanation:

income. 10x+1300

expenses 3x+(1800+1500)

expenses 3x+3300

to break even:

income = expense,

10x + 1300 = 3x + 3300,

solve for x.

step-by-step explanation:

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