Please someone help me out I don't understand ;-;

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?

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

Write a similarity statement for the similar triangles. afgh ~ a