Hey! i know how to compare scientific notation, but i don't understand what they are asking me to do here.
in 2010, the number of participants in a checkers tournament was 2.6 × 104 people. in 2013, the number of participants in a checkers tournament was 5.2 × 106 people. by what factor did the number of participants increase from 2010 to 2013?
a
7.8 × 1013
b
2 × 1013
c
7.8 × 102
d
2 × 102

Which graph represents the equation y =4x

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)