A red blood cell is 7 x 10-6 in diameter. there are about 2 x 10-13 red blood cells in a 125-lb person. if all of the red cells line up end to end how long would the like be? write your answer in scientific notation PLEASE HELP DUE IN 1 HOUR!!!

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total