The distance between a chord and the center of a circle is 4 cm. what is the radius of the circle if the chord measures 16 cm? i know the answer is 8.9cm, but can you explain how you got to it ?

Aright triangle has an area of 18 square inches. b: if the triangle is not an isosceles triangle, what are all the possible lengths of the legs, if the lengths are whole numbers. answer !

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.