(6.2*10^17)+(1.2*10^15)/(4*10^-6) write your answer in scientific notataion

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.