exam Maths Puzzle Numerical Ability

what is the answer to 4.5% of 0.94 cm

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exam Other Question

The combined resistance of two resistors R1 and R2 in a
parallel circuit is given by the formula

Rt= 1 divided by 1/r1+1/r1 simplify the formula. woosh over my head!
Solve the following equations. Round to 4 decimal places when necessary.

a. log3 x=8

b. 27^2x+2=81^x-3

c. log2 (3x+2)=3

d. e^3x=80

e. logx 729/4096=6

f. log5 325