Ahalf-dollar has a diameter of about 31 millimeters. about how long would a row of 56 half dollars be?

Answer:

A row of 56 half dollars will be 1736mm  long

Explanation:

Given:  

The diameter of half dollar = 31mm

Solution:

If we put two half dollar in a row then the row will become

But we put another two half dollars  in a row then row will be long  and becomes=

Similarly  

If we put 56 dollars in a row then row will be long and becomes = = 1736mm

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²