Solve the following and express each answer in scientific notation and to the correct number of significant figures. a). (5.3 x 10^4) + (1.3 x 10^4) b). (7.2 x 10^-4) /(1.8 x 10^3 c). 10^4 x 10^-3 x 10^6 d). (9.12 x 10^-1) - (4.7 x10^-2 e). (5.4 x 10^4) x (3.5 x 10^9)

Scientific notation always have a decimal part multiplied by 10 raised to the exponent of a positive or negative integer.

a)

b)

c)

d)

e)

When working on multiplication and division of numbers in scientific notation, the laws of indices are applied as shown in the results above.

For addition and subtraction, the both numbers in scientific notation must be made to have a common exponent before the operation can be carried out successfully.

Also note that the correct number of significant figure must be maintained in the results obtained from each operation.

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a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.