Answer:
On day 4 Sven will drive around the block 16 times.
Step-by-step explanation:
On day 1, Sven rides around the block 2 times.
On the following 4 days, he rides double the number of times he rode around the block on the previous day.
On day 2 he will drive around the block 2×2=4 times.
On day 3 he will drive around the block 2×4=8 times.
On day 4 he will drive around the block 2×8=16 times.
Hence, On day 4 he will drive around the block 16 times.