The question is stated below in the png! Thank you!

$35.25

Step-by-step explanation:

First, we subtract the 42.30 and 28.20 to get 14.1

Then, we find half of that 7.05  

Then, we know that it goes up by 7.05 each hour

so add 7.05 to 28.20

35.25

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