Which shows the expression below in simplified form?

(5.5 × 10^-6) - (3.7 × 10^-7)
a.
1.8 × 10^-6
b.
1.8 × 10^-7
c.
5.463 × 10^-6
d.
5.13 × 10^-6

Match the term on the left with its image or description on the right. match term definition diameter a) circle a and a line segment connecting points b and c which are on the circle. circumference b) circle a and a line segment connecting points b and c which are on the circle. radius c) a piece of the circumference of a circle secant d) two circles that share the same center. concentric circles e) the distance around a circle arc f) a segment between two points on a circle that passes through its center

If i have 20$ and i gave 5$ away how much i got

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.