Bianca calculated the height of the equilateral triangle with side lengths of 10. then, she used the formula for area of a triangle to approximate its area, as shown below. calculate the area of the equilateral triangle using the formula for area of a regular polygon, and compare it to bianca’s answer. the apothem, rounded to the nearest tenth, is . the perimeter of the equilateral triangle is . therefore, the area of the equilateral triangle , or approximately 43.5 units2. the calculated areas

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.