Question

Sandra is reading a 600 page book for her club. She reads 45 pages each hour. Which equation represents the number of pages S(t), Sandra has left to read after t hours of reading?

a) S(t) = 600 - 45t
b) S(t) = 45t - 600
c) S(t) = 600 + 45t
d) S(t) = 600t - 45

Answer 1

The equation that represents the number of pages Sandra has left to read after t hours of reading is S(t) = 600 - 45t.

Step-by-step explanation:

The equation that represents the number of pages Sandra has left to read after t hours of reading is S(t) = 600 - 45t.

Here's how we can derive this equation:

1. Let's say the initial number of pages Sandra has to read is 600.
2. Since she reads 45 pages each hour, after t hours, she would have read 45t pages.
3. Therefore, the number of pages she has left to read would be the initial number of pages minus the pages she has read, which is 600 - 45t.

So, the correct equation is S(t) = 600 - 45t.