The formula for the area of a circle is A=(pi)r^2 , where r is the radius of the circle. Find the radius of a circle whose area is 113.1 square inches. Step by step please!

Yesterday, george drank 1 small bottle and 2 large bottles, for a total of 1,372 grams. the day before , he drank 1 small bottle and 1 large bottle, for the total of 858 grams. how many grams does each bottle hold?

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20