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irga5000 [103]
2 years ago
7

You attend a karaoke night and hope to hear your favorite song. The karaoke song book has 900 different songs (your favorite son

g is among them). Assuming that the singers are equally likely to pick any song and no song repeats, what is the probability that your favorite song is one of the 20 that you hear that night?
Mathematics
1 answer:
Afina-wow [57]2 years ago
7 0
20/900
I not sure though
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The last time Alejandro's height was measured he was 61.5 inches tall. He was measured again today and is now 68.7 inches tall.
stiv31 [10]

Answer:

He grew 7.2 inches.

Step-by-step explanation:

68.7-61.5=7.2

Expression:

68.7-61.5=g

or

61.5+g=68.7

6 0
3 years ago
A tank contains 1000L of pure water. Brine that contains 0.02kg of salt per liter enters the tank at a rate of 5L/min. Also, bri
tankabanditka [31]

Answer:

51.877 kg

Step-by-step explanation:

a

See attachment for calculations

b

The amount of salt in the tank after 4 hours is gotten by simply replacing t in the equation from a, with 4 hours. Since the t gotten in a above is in minutes, we'd convert hours to minute as well. If we do that, we have

t = 4 hours = 4 * 60 minutes = 240 minutes

y = 160/3 (1 - e^((-3 * 240)/200))

y = 160/3 (1 - e^(-720/200))

y = 160/3 (1 - 0.0273)

y = 160/3 (0.9727)

y = 51.877 kg

Therefore, the amount of salt in the tank after 4 hours is 51.877 kg

3 0
3 years ago
Homework due tomorrow pls help !!
Andrej [43]
8+3+11=22
8 divided by 2=4
11-3=8
2+3+3=8
soo =8
♦️=3
⭐️=11
5 0
2 years ago
Read 2 more answers
Find the first five terms of the sequence given by a 1 = 2, a n = 3 a n -1 - 1.
lara31 [8.8K]

Answer:

2, 5, 14, 41, 122

Step-by-step explanation:

Using the recursive rule with a₁ = 2

a₂ = 3a₁ - 1 = 3(2) - 1 = 6 - 1 = 5

a₃ = 3a₂ - 1 = 3(5) - 1 = 15 - 1 = 14

a₄ = 3a₃ - 1 = 3(14) - 1 = 42 - 1 = 41

a₅ = 3a₄ - 1 = 3(41) - 1 = 123 - 1 = 122

The first 5 terms are 2, 5, 14, 41, 122

8 0
2 years ago
Read 2 more answers
!!!! PLEASE HELP !!!!!!
Keith_Richards [23]

Answer:

i got -8 but the closest is -7 so u can tried that

Step-by-step explanation:

5 0
3 years ago
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