Which is the better estimate of the mass of a wrist watch, 50 grams or 50 kilograms. and sandy used beachmarks to estimate that there are more inches than feet in one yard is sandy' estimate reasonable? explain. and last one jonathan thinks that he rides his bicycle about 4 meters from his house to school each day. is jonathan's estimate resonable?

1)  50 grams

2) His estimate was right.

3) Jonathan's estimate is not reasonable.

Step-by-step explanation:

1)

" A wrist watch is a small watch that is attached to a bracelet or strap and is worn around the wrist "

The better estimate of the mass of a wrist watch is 50 grams and not 50 kilograms because it would be very difficult for someone to wear a heavy weight thing in their wrist.

Hence answer is 50 grams.

2)

There are 36 inches in 1 yard.

and there are 3 foot in 1 yard.

Hence, Sandy's benchmark was reasonable  that there are more inches than feet in one yard.

3)

Jonathan thinks that he rides his bicycle about 4 meters from his house to school each day.

As 4 meter is not a long distance so he won't have to use his bicycle to go to school.

Hence, Jonathan's estimate is not reasonable.