3 x 10 ^4 as an ordinary number

30000

Step-by-step explanation:

30,000

Step-by-step explanation:

First exponents first so 10^4 is 10,000

10,000 times 3 is 30,000

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)