Answer:
y= 1x
Step-by-step explanation:
Formula for the area of a circle is Pi*radius squared
So, we do Pi*2^2 which is 12.57
Answer: 
Step-by-step explanation:
For this exercise you need to use the following formula:

According to the exercise, the number of kids in a robotics club grew from 23 to 31; then you can identify that:

Knowing these values, you can substitute them into the equation and then evaluate, in order to find the percent increase in the number of kids in the club. Then:

Rounding it to the nearest whole percent:
