The distance formula is:

We are given two points in the form (x,y), so plug in the values to the distance formula:

Next we can simplify. We know that 12-12 is 0, so we can drop it from the equation, as it will not affect our answer. Also, we know that -10-15 is -25:

The square and square root cancel each other out leaving us with 25.
The answer is 25.
Answer: it would take her 15 hours to read 400 pages
Step-by-step explanation: 400 devided by 80 is 5 and 5 x 3 = 15 hours
Answer: R(t) = 10 + 0.50t
Step-by-step explanation:
From the question, we've been informed that Joseph's hourly rate is $10 and that for every year he works at the grocery store, his hourly rate increases by $0.50.
Therefore, the function will be
R(t) = 10 + 0.50t