HELP- The decay of a radioactive substance is modelled by a geometric sequence H(n) = Irn-1, where H(n) is the amount left of the substance at time n, in
months, r is the rate of decay, and I is the initial amount of the substance.
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If the initial amount of a radioactive substance is 150 000 g, and it decays, losing 1%
of its mass per month, then how much of the substance is left at the end of year 4?

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

multiple all that

step-by-step explanation:

27×17

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.