At a particular music store, cds are on sale at $12.00 for the first one purchased and $9.00 for each additional disc purchased. maria spends $84.00 on cds. how many cds has maria purchased?

Maria purchased 9 CDs

Step-by-step explanation:

Maria spends $84.00 on CDs. The first CD is $12,  the rest $9

As the CD have different price ,  first we have to discount the price of the first one,  and then we divide the rest by $9

Price First CD = $12 ,

We buy the first ,  so we get the rest of money  84-12=72

Price Rest =$9 ,  with the money that left ,  we can buy 72/9= 8

Total= 1 +8 =9

65°

step-by-step explanation:

the total measure of a triangle is 180 degrees. 62 + 53 is 115.

180 - 115 = 65

step-by-step explanation:

i found the life tables for the year 2012. 

life table of males at age 30. probability of dying between ages x and x+1

total population:  

29–30 . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . 0.001061

males:  

29–30 . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . 0.001399

non hispanic white population

29–30 . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . 0.001116

non hispanic white males

29–30 . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . 0.001503

jacob, non hispanic white male. 30 years old.

probability that jacob lives to be 30 years old. 

since the given probabilities are probabilities of dying, i think we simply subtract it from 1 to get the probability of living. we will use the probability of non hispanic white male.

                                          probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497