Find a ∩ b.
a) {3,5,6,7,8,11,12}
b) {3,5,6,7,8,12}
c) {3,7,6,5}
d) {3,7}

Step-by-step explanation:

The intersection of two sets A and B, consists of all elements that are both in A and B.

Therefore:

Look at the picture.

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