Acircles is twice as long as its radius.

a. area
b. diameter
c. radius
d. circumference
e. pi

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?

Evaluate the expression. (9 + 5)(3 + 2)0

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.