Use the rate equation \( d=r \cdot t \) to solve the following problem. At 1:30 p.m. Kelsey leaves her house and drives at an average speed of 35 miles per hour to her sister's house. She arrives at \( 3: 30 \) p.m. a. How many hours was the drive to her sister's house? The drive was \( \square \) hours. b. How many miles from her sister does Kelsey live? Kelsey lives \( \square \) miles from her sister.

To find out how many hours Kelsey's drive took, we can determine the time from 1:30 p.m. to 3:30 p.m. That’s a total of \( 2 \) hours of driving. So, the drive was \( 2 \) hours. Next, to find out how many miles she lived from her sister, we can use the rate equation \( d = r \cdot t \). Here, the rate \( r \) is \( 35 \) miles per hour, and the time \( t \) is \( 2 \) hours. Plugging in these numbers, we get \( d = 35 \, \text{miles/hour} \cdot 2 \, \text{hours} = 70 \) miles. Kelsey lives \( 70 \) miles from her sister.