Awaffle cone is packed with chocolate ice cream inside and is topped with a scoop of vanilla ice cream (a hemisphere) that has a radius of 3.5 cm. the volume of the vanilla ice cream is the same as the volume of the chocolate ice cream inside the waffle cone. find the height of the waffle cone?
i have already worked out an answer, i'm just looking for a confirmation.
15 !

Drag and drop the answers into the boxes to complete this informal argument explaining how to derive the formula for the volume of a cone. since the volume of a cone is part of the volume of a cylinder with the same base and height, find the volume of a cylinder first. the base of a cylinder is a circle. the area of the base of a cylinder is , where r represents the radius. the volume of a cylinder can be described as slices of the base stacked upon each other. so, the volume of the cylinder can be found by multiplying the area of the circle by the height h of the cylinder. the volume of a cone is of the volume of a cylinder. therefore, the formula for the volume of a cone is 1/3 1/2 1/3πr^2h 1/2πr^2h πr^2h πr^2

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

Polynomial that can be factored as (3x-4)(3x+4)