ACT Math Practice Test 25

The volume, V, of a sphere is determined by the formula V = $\frac{4\pi R^{3}}{3}$ , where r is the radius of the sphere. What is the volume, in cubic inches, of a sphere with a diameter 12 inches long?

The number 0.002 is 100 times as large as which of the following numbers?

An overlay of an accessibility ramp of a building is placed on the standard (x, y) coordinate plane so that the x-axis aligns with the horizontal. The line segment representing the side view of the ramp goes through the points (−2,−1) and (16,2). What is the slope of the accessibility ramp?

In a 3-dimensional (x, y,z) space, the set of all points 5 units from the x-axis is:

Due to inflation, a refrigerator that formerly sold for $450 now sells for 7% more. Which of the following calculations gives the current cost, in dollars, of the refrigerator?

Which of the following is an equivalent form of x + x(x + x + x)?

What is the value of b in the solution to the system of equations below?
3a − b = 18
a + 3b = −4

If n = 10, then which of the following represents 552?

If 0 < pr < 1, then which of the following CANNOT be true?

Which of the following is NOT a solution of (x − 5)(x − 3)(x + 3)(x + 9) = 0?

For a ≠ 0, $\frac{a^{9}}{a^{3}}$ is equivalent to:

If x² − y² = 49 and x − y = 7, then x =?

How many different positive 3-digit integers can be formed if the three digits 3, 4, and 5 must be used in each of the integers?

How many ordered pairs (x, y) of real numbers will satisfy the equation 5x − 7y = 13?

If $\sqrt{2x}$ + 5 = 9, then x = ?

One traffic light flashes every 6 seconds. Another traffic light flashes every 9 seconds. If they flash together and you begin counting seconds, how many seconds after they flash together will they next flash together?

Which of the following is equal to $\frac{\left ( \frac{1}{3}-\frac{1}{4} \right )}{\left (\frac{1}{3}+\frac{1}{4} \right )}$ ?