Question 1(multiple choice worth 5 points) (07.01 mc) the amount of radioactive uranium changes with time. the table below shows the amount of radioactive uranium f(t) left after time t: t(hours) 0 0.5 1 f(t) 100 50 25 which exponential function best represents the relationship between f(t) and t?

the answer would be f(t) = 100(0.25)t

This represents a half life equation - since as time increases, radioactivity decreases by half. If we take our exponential function

y = a(r)^t, r = 1/2 since as t increases, y halves. The initial amount of radiation is 100, so a = 100

Thus we get f(t) = 100(1/2)^t

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

i think it is c, not positive though

step-by-step explanation: