The area of a rectangular ice skating rink is 900 square yards if the length of the rink is 100 yards with is the width of the rink

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?

Can someone me do math because i am having a breakdown rn because i don’t get it

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4