Use the exponential decay model, Upper A equals Upper A 0 e Superscript kt, to solve the following. The half-life of a certain substance is 21 years. How long will it take for a sample of this substance to decay to 63% of its original amount? It will take approximately nothing ▼ percent percent per year years for the sample of the substance to decay to 63% of its original amoun

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

where is the figure

answer:

1.14285714286

step-by-step explanation:

divide 40 into 35 and you will get your answer