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SCORPION-xisa [38]
3 years ago
6

Please help with this question, I need to make sure I'm right. Thanks

Mathematics
1 answer:
Lina20 [59]3 years ago
4 0

an=4n+1

Sum of first 30 terms

a1+a2+.................a30

 Sn=(a1+an)*n/2

a1-----------first terms

an=---------last term-----a30

n= number of terms-----30

 calculation of a1

a1=4n+1=4*1+1=5

 calculation of an

a30=4*30+1=121

 S30=(a1+a30)*30/2

S30=(5+121)*30/2=1890

<span>The sum of first 30 terms is 1890</span>


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Step-by-step explanation:

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Ms. Ross has 24 students. 2/3 of her students have brown hair. The rest have blonde. How many students have brown?
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The closing price of Schnur Sporting Goods Inc. common stock is uniformly distributed between $16 and $30 per share.
serg [7]

Answer:

a) 0.3571 = 35.71% probability that the stock price will be more than $25.

b) 0.1429 = 14.29% probability that the stock price will be less than or equal to $18.

Step-by-step explanation:

Uniform probability distribution:

An uniform distribution has two bounds, a and b.

The probability of finding a value of at lower than x is:

P(X < x) = \frac{x - a}{b - a}

The probability of finding a value between c and d is:

P(c \leq X \leq d) = \frac{d - c}{b - a}

The probability of finding a value above x is:

P(X > x) = \frac{b - x}{b - a}

Uniformly distributed between $16 and $30 per share.

This means that a = 16, b = 30

a) More than $25?

P(X > x) = \frac{30 - 25}{30 - 16} = 0.3571

0.3571 = 35.71% probability that the stock price will be more than $25.

b) Less than or equal to $18?

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4 0
2 years ago
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LUCKY_DIMON [66]

Answer: 7/24

Step-by-step explanation:

11/8 - 5/8=

= 11/8 - 5/8

= 11/12 + -5/8

= 22/24 + -15/24

= 22 + -15/<u>/24</u>

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7 0
3 years ago
Rudy has 10 white she sells 23 pink seashells and 21 Brown see cells if he divides the cells into equally between three friends
Alex_Xolod [135]

Answer:

Each friend will get 18 sea shells.

Step-by-step explanation:

Given:

Rudy has white sea shells = 10

Rudy has pink sea shells = 23

Rudy has brown sea shells = 21

Number of friends = 3

Rudy divides the sea shells into equally between three friends.

We need to find how many sea shells each friend can get.

Now first we find the total number sea shells.

Total number of sea shells = white sea shells + pink sea shells + brown sea shells = 10 + 23 + 21 = 54

Now to find number of sea shell each friend can get we will divide total number of sea shell with number of friends.

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Hence each friend will get 18 sea shells.

8 0
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