a toxic radioactive substance with a density of 4 milligrams per square centimeter is detected in the ventilating ducts of a nuclear processing building that was used 35 years ago. if the half- life of the substance is 20 years, what was the density of the substance when it was deposited 55 years ago?

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

3,750 deer

step-by-step explanation:

1,500 is 15 times larger than 100

lets make 250 15 times larger.

3750 deer

the k side

step-by-step explanation:

plese mark mde brainliest!

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).