Practice calculations and express with the right number of significant figures.

Question

Practice calculations and express with the right number of significant figures.
Solve for x then show three sig figs in each answer.

Perform each one of the following calculations. Express all answers with the appropriate number of significant figures (0b) (6.02 x 10-)/(53.123 x 10-3) (c) 76.987 x 10-+34.1 x 10+ 0.341 x 10- (d) 3.02x 10) x (7.5 x 10) 6. Bsic Algebra Review. Solve each of the following equations for". Show all workf!! Show three sig figs in each answer unless it is a single digit integer please. (a) (13x+-12y3-14/3 x= (b) x(3x) = 3 (c) 4/x - 13.3333 (d) (4x-7) / (2-x)= -(9/3) (0 In (5/x)-2.3

Explanation / Answer

a) (13x - 12)/3 = 14/3

or, 13x - 12 = 14

or, 13x = 26

or, x = 2

b) x/(3/x) = 3

or, x2/3 = 3

or, x2 = 9

or, x = +/- 3

c) 4/x = 13.3333

or, x = 4/13.3333

or, x = 0.3

d) (4x - 7)/(2 - x) = -9/3

or, 4x - 7 = -18/3 + 9x/3

or, 4x - 9x/3 = 7 - 18/3

or, 3x/3 = 3/3

or, x = 1

e) (1/9) - (1/20) = 10x

or, 11/180 = 10x

or, log(11/180) = log(10x)

or, log(11/180) = xlog10

or, x = log(11/180)

or, x = -1.214

f) ln (5/x) = 2.3

or, 5/x = e2.3

or, x = 5/e2.3

or, x = 0.5

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