ok there these 3 kids who sold cookies and here are there rates and if their continuing a the rate if they sold the cookies at 2.00 a piece how many days will it take to make 320.00

at their rates?
Maria 39cookies/13days

Stephen 42cookies/7days
Aisha 21cookies / 3 days
I don't understand how you get the answer 320 please show me

320 altogether, or 320 each?

Maria sells 3 cookies/day
Stephen sells 6 cookies/day
Aisha sells 7 cookies/day

So, all 3 of them sell 16 cookies/day

Now you should be able to figure what you need.

16000

To calculate the number of days it will take for each kid to make $320 selling cookies at their respective rates, we need to find the total number of cookies each kid can sell in a day using their given rates.

For Maria, she sells 39 cookies in 13 days, which means she sells 39/13 = 3 cookies in a day.

For Stephen, he sells 42 cookies in 7 days, which means he sells 42/7 = 6 cookies a day.

For Aisha, she sells 21 cookies in 3 days, which means she sells 21/3 = 7 cookies a day.

Now, we can calculate how many days it will take for each kid to make $320 by dividing $320 by the number of cookies they sell in a day.

For Maria, it will take her $320 / $2 = 160 cookies to make $320. Since she sells 3 cookies in a day, it will take her 160 / 3 = 53.33 days. Since we can't have a fraction of a day, we can round it up to 54 days.

For Stephen, it will take him $320 / $2 = 160 cookies to make $320. Since he sells 6 cookies in a day, it will take him 160 / 6 = 26.67 days. Rounding it up, it will take him 27 days.

For Aisha, it will take her $320 / $2 = 160 cookies to make $320. Since she sells 7 cookies in a day, it will take her 160 / 7 = 22.86 days. Rounding it up, it will take her 23 days.

So, to make $320 selling cookies at their respective rates:
- Maria will take 54 days
- Stephen will take 27 days
- Aisha will take 23 days.