Marconi, a plumbers helper works 45 hours in 1 week .He earns $6.78 an hour with 5 of the 45 hours at double time . Find marconi gross pay.

40*6.78=$271.20

5*13.56=$67.80

Add the two answers:

$339

Step-by-step explanation:

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

17.08

correct me if i am wrong.