All four of jack's grandparents have an ab blood type. what is the probability that jack has an a blood type.

Factor this polynomial completely x^2-64

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?