What is the answer to 6 and a number is $7.80

$1.80

Step-by-step explanation:

Take the number 6 and change it to money form, ($6.00)

Then take the number $7.80 and subtract $6.00. You will end with the answer, $1.80.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500