A radioactive isotope that was originally 275 grams has decayed to 150 grams. the equation shown can be used to calculate the number of years/T, it took for the decay to occur 150 + 275e ^-0.1386t
what is the approximate number of years it took for the isotope to decay for 275 grams to 150 grams?

A.0.1 years
B.0.4 years
C.1.9 years
D.3.9 years
E.4.4 years

answer: 2/4

step-by-step explanation:

need more info

step-by-step explanation:

look at the picture i have filled out a table for it. hope this .

arc length = 6.63311 ft.

step-by-step explanation:

the formula the arc measure is:

arc length s=2πr(c)/360

where:

c   is the central angle of the arc in degrees

r   is the radius of the arc

π   is pi, approximately 3.142

using the above formula we get

s =

thus we find that arc length of an arc for a circle of radius 20 feet and central angle 19 degrees is

6.63311 feet