B. 300,000 + 50,000 + 1,000 + 800 six hundred five thousand, nine hundred eight

C. 3 hundred thousands 3 thousands 8 hundreds 4 tens
303,840

d. 5 hundreds 6 ten thousands 2 ones
3 ten thousands 5 hundreds 1 one

3702780 for the first question

Step-by-step explanation:

Add all the zeroes then add the whole numbers

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!