Mark and jon each decide to start saving money. mark has $150 dollars and
plans on putting $20.00 in his account each month. jon is a little of a
procrastinator. he has only $100 but plans on putting $25 in his account after
the first month. after 8 months who has saved more and by how much?

mark saved $10 more

Step-by-step explanation:

150 + 20 multiplied by 8=310   Mark

100 + 25 multiplied by 8=300 Jon

310-300=10

mark saved $10 more

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

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.