Radium 226, which had been used for cancer treatment, decays with a half-life of 1622 years.
a. Find the constant K using 1 g as the original amount of radium 226
b. Suppose there is a 2.3 g sample of radium 226. How long will it take to have 1.7 g remaining?

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

sorry i just need to anwers this to get points

step-by-step explanation: