Mrs. Vega is thinking of numbers that are multiples of 9. Which of the following could be Mrs. Vega's numbers? Choose all that apply. 23
23

19
19

54
54

45
45

18

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

Which number produces an irrational number multiplied by 1/3