Juanita borrowed $600 to purchase a new computer. She was charged 7% interest for two years. She used the
simple interest formula to find the interest.
= 600(7)(2)
What error did Juanita make and how will her error affect
the interest she calculates? Explain.

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Which two undefined geometric terms always describe figures with no beginning or end?

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z