5th grade math
posted by jill .
The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long?
Also to find the circumference of a circle do you use the radius or diameter x 3.14?

The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long?
12 divided by 3/4
Also to find the circumference of a circle do you use the radius or diameter x 3.14?
The circumference of a circle is
3.142 x diameter
or
2 x 3.142 x radius