Answer my question PLAESAE

In pqr the obtuse angle is 105 and the shorter sides measure 4 and 7 units rounded to the nearest tenth what is the area of triangle pqr

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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?