The price of a printer was reduced from $400 to $160. What was the percent of decrease?

23. Interphase is made up of what stages of the cell cycle?  

Divide and give the answer in simplest form.  

Students at Maple School earned $672 selling candies. They want to accumulate $2000 for a trip.  What percent of their goal has been reached?

10. Before cell division of somatic cells, each chromosome must be replicated.  After replication, the resulting two parts of each chromosome are held together by cohesion at the centromere.  These two parts when separated are referred to as:  

Change the fraction to a mixed number.

If a and b are rational numbers with and , and if m is an integer, determine if the following is true or false:  

The double helix model of DNA structure was proposed by

A retail store had monthly sales of $56200 and spent 20% of it on health insurance. How much was spent on health insurance?

24. During what stages of the cell cycle are sister chromatids bound together by cohesin?