Author Archives: Elizabeth

ACT Question of the Day Explained – February 27, 2014 – Math, Ratios

Today’s ACT question of the day is a great ratio question to review no matter which test you’re taking.

In a shipment of 1,000 light bulbs,  of the bulbs were defective.
What is the ratio of defective bulbs to nondefective bulbs?

When we are dealing with ratios, we have to consider the different types: part-to-part and part-to-whole. Continue reading

SAT Question of the Day Explained – February 27, 2014 – Math, Algebra

Today’s SAT question of the day is a medium-difficulty math question that asks us about the term “undefined”.  Undefined, for the purposes of the SAT, means that we’d be dividing by zero. Every time you see that word, translate it into “divide by zero.”

Today we need to know what value of x would make this equation undefined for y:

y equals ((x plus 1) times (x minus 2)) over ((x plus 3) times (x minus 4))

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ACT Question of the Day Explained – February 25, 2014 – Science

Who lives in a sediment under the…ocean?

Today’s ACT question of the day is a science question from the passage about sediment in the bottom of the ocean. This time, we need to find the depth that would be a good home for a creature that likes low concentrations of Fe2+, high concentrations of O2, and a neutral pH. Continue reading