Dado sec A =1.30541, encuentra ala medida del angulo A

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Which of the following expressions is equal to 2x^2+8

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles