The side length is the square root of the area, so is ...
... √(25/16 ft²) = (√25)/(√16) ft = 5/4 ft
The general equation for computing the circumference of a circle is

, where C is the circumference, and d is the diameter. (You might also see the equation as

where r is the radius, because

)
Computing the circumferences of the two circles, we get:


.
To calculate the ratio of two numbers, we can divide one by the other. You can look at this as "How many times does the denominator fit in the numerator?"

So the circumference of the complex impact crater is 2 times greater than the circumference of the simple impact crater.
Yes your answers look correct nice job
Total number of marbles = 10
Number of red marbles = 4
Number of blue marbles = 6
Probability = 
The probability that the first marble is blue = 
The probability that the first marble is red =
; 9 because 1 marble has already been taken out.
Joint probability= probability of event A * Probability of event B
=
=
For 10/3 times as much money, you can buy 10/3 times the weight of ham.
(10/3)*(4/5 lb) = 40/15 lb = 8/3 lb
For $10 you can buy 8/3 lb of ham.