An isotope of technetium is used to prepare images of internal body organs. This isotope has a half-life (time required for half the material to erode) of approximately 6 h. If a patient is injected with 30 mg of this isotope, what will be the technetium level in the patient after 5 h? Use the function A(t) = 30(?)" , where A is the technetium level, in milligrams,.in. the patient after t hours. Round to the nearest tenth of a microgram. 8 mg

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations