How many 4-digit personal identification numbers are possible if the number  cannot  contain a zero?
a.
5,040
b.
6,561
c.
9,000
d.
10,000

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000