Jack spends 1 4/5 times as long on his homework as jill. Last week, jill spent 7 3/4 hours doing homework. How long did jack spend doing homework

13.95 hours or 837 min

Step-by-step explanation:

1+ 4/5=9/5 7+3/4=31/4

9/5=1.8; 31/4=7.75

1.8×7.75=13.95 hours

13.95×60min=837min

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