Digital ACT Practice Questions

Choose the best option for the underlined portion: Scattered across the remote Alaskan tundra lies the skeletal remains of a Pleistocene woolly mammoth....

Choose the best option for the underlined portion: By the time the search-and-rescue team reached the remote alpine cabin, the stranded hikers built a temporary...

Choose the best option for the underlined portion: The international symposium welcomed delegates from Tokyo, Japan, Zurich, Switzerland, and Nairobi, Kenya....

Choose the best option for the underlined portion: The computational simulation required seventy-two hours of supercomputer processing; consequently, the resear...

Choose the best option for the underlined portion: The blue whale produces louder low-frequency vocalizations than any animal in the marine biome....

Choose the best option for the underlined portion: With volcanic tremors intensifying and ash plumes rising rapidly, an eruption was eminent....

If log_3(x - 2) + log_3(x + 6) = 2, what is the value of x?...

What is the sum of the infinite geometric series 18 - 12 + 8 - 16/3 + ...?...

An ellipse in the standard xy-coordinate plane has the equation (x - 2)^2 / 25 + (y + 1)^2 / 9 = 1. What is the distance between the two foci of this ellipse?...

What are the equations of the asymptotes of the hyperbola with equation x^2 / 16 - y^2 / 25 = 1?...

Which of the following complex numbers is equivalent to the expression (3 + 4i) / (1 - 2i)?...

Two similar solid cones have surface areas of 36pi square centimeters and 81pi square centimeters, respectively. If the volume of the smaller cone is 48 cubic c...

In the expansion of (2x - 3)^5, what is the coefficient of the x^3 term?...

If sin(theta) = 3/5 and theta is an acute angle in Quadrant I, what is the value of sin(2*theta)?...

Which of the following datasets has the greatest standard deviation?...

What is the equation of the tangent line to the circle x^2 + y^2 = 25 at the point (3, 4)?...

What is the value of z in the solution to the system: x + y + z = 6, 2x - y + z = 3, and x + 2y - z = 2?...

In triangle ABC, side a = 5, side b = 12, and angle A = 30°. How many distinct triangles can be formed with these measurements?...

A committee of 3 people is to be selected from a group of 7 candidates: Alice, Bob, and 5 others. If Alice and Bob refuse to serve on the committee together, ho...

An enzyme was tested with a constant substrate concentration in the presence of an inhibitor: - No inhibitor: Vmax = 100 umol/min, Km = 2.0 mM - Inhibitor X: Vm...

A sound tuning fork of 512 Hz was held over a cylindrical water column: - First resonance occurs at air column length L1 = 16.5 cm. - Second resonance occurs at...

Coral fragments were grown in seawater mesocosms with varying dissolved CO2: - pH 8.1 (ambient): Calcification rate = 1.25 mg CaCO3/cm^2/day - pH 7.8: Calcifica...

The total radiant power per unit area of a blackbody was measured at various temperatures: - T = 300 K: Power = 459 W/m^2 - T = 600 K: Power = 7,348 W/m^2 When ...

Two astrophysicists debate galaxy rotation curves: Scientist 1 argues that cold dark matter halos surround galaxies, providing missing gravitational mass to exp...