Digital ACT Math Practice Question #1265
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
Divide by 2 repeatedly: $640 \rightarrow 320 \rightarrow 160 \rightarrow 80 \rightarrow 40 \rightarrow 20 \rightarrow 10$. Takes under 10 seconds.
Calculate the number of half-lives elapsed: $n = \frac{\text{Total Time}}{\text{Half-life}} = \frac{48}{8} = 6$. The remaining activity is given by $A = A_0 \left(\frac{1}{2}\right)^n = 640 \left(\frac{1}{2}\right)^{6} = \frac{640}{64} = 10...
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
Unlock Full Solution & 2,600+ Official Drills
Access detailed Socratic steps, trap breakdowns, authentic timed module simulations, and Desmos speed hacks for just $9.99/mo.
What are the equations of the asymptotes of the hyperbola with equation x^2 / 16 - y^2 / 25 = 1?...
In $\triangle ABC$, the length of side $a$ is $8$ cm, the length of side $b$ is $11$ cm, and the measure of angle $C$ be...
What is the domain of the real-valued function $f(x) = \frac{\sqrt{4x - 12}}{x - 7}$?...
A solid metal cylinder with radius 2 inches and height 6 inches is melted down and recast into a sphere. Assuming no met...