Is √20 a rational or irrational number ? explain how you know

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?

Which of the following is true about the graph of f(x)=7^x. select all that apply. a= it intercepts the x axis b=it intercepts both axis c=it intercepts neither d=it intercepts the y axis

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9