Answer: The "zero" is: " 2 [tex]\frac{11}{12}[/tex] " ; or, write as: " 2.92 " ._____________________________________ → " t = 2 [tex]\frac{11}{12}[/tex] " ; or, write as: " t = 2.92 " ._____________________________________Step-by-step explanation:_____________________________________Letting assume that this given function is supposed to be written as: "distance as a function of time" ; that is: d(t) = 70 - (2.4)t ; → since distance, "d" is the dependent variable (cannot be "manipulated or controlled") and as such, belongs on the "y-axis"—as the "dependent variable" ; whereas as time, "t" ; can be somewhat controlled (with respect to distance, at list as a starting point); and as such belongs on the "x-axis" as the "independent variable" .Since no "specific units" are given to us in the problem for Either "distance" or "time" ; we shall use the term "units" to describe their values.We have: d(t) = 70 - (2.4)t ; Let us rearrange this: 70 - (2.4)t ; ↔ = 70 + (- 2.4)t ; ↔ = (-2.4)t + 70 ; And rewrite the function: → d(t) = (-2.4)t + 70 ; To find the "zero" ; or "zeros" ; of this function; set "d(t)" equal to "zero" ; that is; "0" ; and solve for the value(s) for "t" when "d(t)" = 0 : → 0 = -2.4(t) + 70 ; ↔ Rewrite as: → -2.4(t) + 70 = 0 ; For simplicity; let us multiply Each side of the equation by "10" ; to get rid of the decimal value: 10*[ (-2.4)t) + 70 ] = 10 * [0] ; From the left-hand side of the question:Note the "distributive property" of multiplication: a(b + c) = ab + ac ; As such: 10* [-2.4(t) + 70 ] = [10* -2.4(t)] + [10 * 70] = -24t + 70 ; From the "right-hand side" of the equation: 10 * 0 = 0 . __________________________________So; we rewrite the equation as: -24t + 70 = 0 ; __________________________________Solve for " t " ; -24t + 70 = 0 ; Subtract "70" from Each Side of the equation; -24t + 70 - 70 = 0 - 70 ; to get: -24t = -70 ; Now, let's multiply each side of the equation by "-1" ; to get rid of the "negative values" ; -1* (-24t) = -1(-70) ; to get: 24t = 70 ; Now, let's divide Each Side of the equation by "24" ; to isolate: "t" ; on one side of the equation; & to solve for "t" ; 24t / 24 = 70/24 ; to get: t = 70/24 ; To simplify: either: 1) use calculator: 70 ÷ 24 = 2.916666666 ; → round to: 2.92 ; → t ≈ 2.92 ; or: " [tex]\frac{70}{24} =\frac{(70/2)}{(24/2)}=\frac{35}{12}[/tex] ; → write as simplified improper fraction: " t = [tex]\frac{35}{12}[/tex] " → or: write as mixed number: → " [tex]\frac{35}{12}[/tex] = 35 ÷ 12 = 2 R 11 12 ⟌35 - 24 1 1 → write as: " 2[tex]\frac{11}{12}[/tex] " ; → " t = 2 [tex]\frac{11}{12}[/tex] " ._____________________________________Hope this is helpful to you. Wishing you the best!_____________________________________