You have 80 grams of a radioactive kind of cadmium. How much will be left after 90 days if its half-life is 45 days?

because its not ur topic and its not for is for homework not that.

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

step-by-step explanation:

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