So, Jerome bought a total of 80 cards (8x10) out of which he gave out 30 cards (3x10) so he has 50 cards left. (80-30)
5) 74.925
6) 470
i think this is correct but i'm not completely sure
Answer:
29520728184915396206153835295
It would be
3.5 × 10⁻³ kg.
The decimal point must be moved 3 places to the right in order to have it behind the first non-zero digit; this gives us the exponent of 3, and since we are moving the decimal to the right, it is a negative exponent.
15.99×8/100=1.28$ this is the tax
to get the total cost 15.99+1.28= 17.27$