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sergiy2304 [10]
3 years ago
15

PLEASE HELP! - Will give brainliest to correct answer who explains how they got their answer! Thanks :)

Mathematics
2 answers:
Juli2301 [7.4K]3 years ago
7 0
Sum of a geometric sequence for a1=first term and n=which one and r is common ratio is
S_n= \frac{a_1(1-r^n)}{1-r}
so
a1=1 students
r=4
n=5
S_n= \frac{1(1-4^5)}{1-4}
S_n= \frac{(1-1024)}{-3}
S_n= \frac{-1023}{-3}
314 people know


kirill [66]3 years ago
6 0
Just times by 4 on each of you answers 5 times and that will make it 4,096. I hope this is helpfull
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PLEASE HELP ME SHOW ME HOW U GOT YOUR ANSWER PLZ AND THANK U
lara [203]

Answer:

2/3

Step-by-step explanation:

There are 6 marbles in the jar

4 are not purple

P(not purple) = marbles that are not purple/ total marbles

                      = 4/6 = 2/3

3 0
3 years ago
Read 2 more answers
The hanger diagram models the equation 2(n + 7) = 24. What could be the
baherus [9]

Step-by-step explanation:

first of all you times every number with two 2(n-7) then collect like terms then divide

4 0
3 years ago
In a group of a hundred and fifty students attending a youth workshop in mombasa, 125 of them are fluent in kiswahili, 135 in en
jek_recluse [69]

Answer:

The probability that a student chosen at random is fluent in English or Swahili.

P(S∪E) = 1.1

Step-by-step explanation:

<u><em>Step(i):</em></u>-

Given total number of students n(T) = 150

Given 125 of them are fluent in Swahili

Let 'S' be the event of fluent in  Swahili language

n(S) = 125

The probability that the fluent in  Swahili language

P(S) = \frac{n(S)}{n(T)} = \frac{125}{150} = 0.8333

Let 'E' be the event of fluent in English language

n(E) = 135

The probability that the fluent in  English language

P(E) = \frac{n(E)}{n(T)} = \frac{135}{150} = 0.9

n(E∩S) = 95

The probability that the fluent in  English and Swahili

P(SnE) = \frac{n(SnE)}{n(T)} = \frac{95}{150} = 0.633

<u><em>Step(ii):</em></u>-

The probability that a student chosen at random is fluent in English or Swahili.

P(S∪E) = P(S) + P(E) - P(S∩E)

           = 0.833+0.9-0.633

           = 1.1

<u><em>Final answer:-</em></u>

The probability that a student chosen at random is fluent in English or Swahili.

P(S∪E) = 1.1

8 0
3 years ago
Nathaniel drives 45 miles in 30 minutes. If he drove three hours in total at the same rate, how far did he go?
yuradex [85]

Answer:

270 miles

Step-by-step explanation:

45x2=90

90x3=270

8 0
3 years ago
Read 2 more answers
The brain volumes ​(cm cubed​) of 20 brains have a mean of 1111.2 cm cubed and a standard deviation of 125.3 cm cubed. Use the g
valentina_108 [34]

Answer:

Yes, the value 1411.8 cm³ is significantly high.

Step-by-step explanation:

Consider the provided information.

The brain volumes ​(cm cubed​) of 20 brains have a mean of 1111.2 cm cubed and a standard deviation of 125.3 cm cubed.

The range rule of thumb to identify the limits separating values that are significantly low or significantly high is:

The range rule of thumb identifying significant values are as.

Significantly low values are μ-2σ

Substitute the μ = 1111.2 and σ = 125.3 in above formula.

1111.2-2(125.3)=860.6

Significantly high values are μ+2σ

Substitute the μ = 1111.2 and σ = 125.3 in above formula.

1111.2+2(125.3)=1361.8

The value is significantly high due to the value 1411.8 cm³ is not lie between the values 860.6 cm³ and 1361.8 cm³.

Hence, Yes, the value 1411.8 cm³ is significantly high.

3 0
3 years ago
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