ACT prep

Front

What is the theoretical probability of an event?

Back

The theoretical probability of an event is the ratio of the number of favorable outcomes to the total number of possible outcomes.

Front

Define an arithmetic sequence.

Back

An arithmetic sequence is a sequence of numbers in which the difference between consecutive terms is constant.

Front

How do you find the sum of the first n terms of an arithmetic sequence?

Back

The sum of the first n terms (S_n) can be calculated using the formula: S_n = n/2 * (a + l), where a is the first term and l is the last term.

Front

What is a supporting detail in a passage?

Back

Supporting details are facts, examples, or descriptions that help to explain or reinforce the main idea of a text.

Front

What is the significance of quotations in a text?

Back

Quotations provide evidence and support for the author's arguments, adding credibility and depth to the discussion.

Front

What does it mean to pass an electrical current through a solution?

Back

Passing an electrical current through a solution can help to determine the solution's conductivity and the presence of ions.

Front

What is the difference between a scientific use and a non-scientific use of an invention?

Back

A scientific use involves applying the invention for research, experimentation, or discovery, while a non-scientific use may involve casual or recreational applications.

Front

How do you calculate the probability of selecting a specific item from a set?

Back

To calculate the probability, divide the number of ways to choose the specific item by the total number of items in the set.

Front

What is the role of context in understanding a passage?

Back

Context helps readers understand the background, purpose, and implications of the text, enhancing comprehension.

Front

What is the formula for finding the nth term of an arithmetic sequence?

Back

The nth term (a_n) can be found using the formula: a_n = a + (n-1)d, where a is the first term and d is the common difference.