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german
3 years ago
14

20 points to help with this

Mathematics
1 answer:
Vikentia [17]3 years ago
6 0

Answer:

Help what?

Step-by-step explanation:

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The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes. W
aleksandrvk [35]

Answer: d. .2474.

Step-by-step explanation:

Given : The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes.

The cumulative distribution function for exponential distribution is :-

P(X\leq x)= 1-e^{-\frac{x}{\lambda}}  

, where \lambda = Mean of the distribution.

The probability that the service time is between 2 and 4 minutes will be :

P(2\leq X \leq 4)=P(X\leq4)-P(X\leq 2)\\\\= (1-e^{\frac{-4}{2.5}})-(1-e^{\frac{-2}{2.5}})\\\\=e^{\frac{-2}{2.5}}-e^{\frac{-4}{2.5}}\\\\=0.449328964117-0.201896517995\\\\=0.247432446123\approx0.2474

Hence, the correct option is d. .2474.

4 0
3 years ago
Nicole has a collection of dolls that weigh 2/2 gram. How much would 2 dolls weigh?
SashulF [63]

Answer:

2

Step-by-step explanation:

Because 2/2 equals 1, and 1 * 2 = 2

7 0
3 years ago
Jenny was in charge of selling tickets to a family fun night at her school
ra1l [238]
I’ve attached my work below for #4
5) 8% is equivalent to 8 cents so each item was $1.08
Than you know he spent 16.20 so you divided
1.08/16.20 which equals 15
So he got 15 items
6) the moon is 250,000 miles away which is about driving around earth 10 times which would take 6 months (not sure about this one)

Hope this helps!
Have a nice day :)

4 0
4 years ago
Which is the greatest to least, 12 3/4, 12 3/5 and 12.7
Ne4ueva [31]

Answer:

12 3/4, 12.7, 12/5

Step-by-step explanation:

12 3/4 = 12.75

12 3/5 = 12.6

4 0
3 years ago
Read 2 more answers
Find the simple interest earned
Kitty [74]

Answer:

SI = $1,200 ; A = $6,200

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 3%/100 = 0.03 per year,

then, solving our equation

I = 5000 × 0.03 × 8 = 1200

I = $ 1,200.00

The simple interest accumulated

on a principal of $ 5,000.00

at a rate of 3% per year

for 8 years is $ 1,200.00.

6 0
3 years ago
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