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3 years ago

9

you are moving to houston texas and are switching your cellular phone company. your new peak air time rate in houston is $.23 pe

r minute. your bill also includes a monthly access charge. for 110 minutes of peak air time your bill is $51.30

1 answer:

Luda [366]3 years ago

8 0

Add them so the answer will be 118.45

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Use the given data to find the minimum sample size required to estimate the population proportion. margin of error: 0.0080.008

nadezda [96]

Formula for the Minimum Sample size $n=(\frac{z}{E})^2\hat{p}\hat{q}$

The least biased estimate for p and q is 1/2.

$z_{\frac{\alpha }{2}}=z_{{0.01}{2}}=2.58$

Thus

$n=(\frac{2.58}{0.08})^2*0.5*0.5$

$n=260.015$

$n\approx260$

3 0

3 years ago

Find two consecutive even integers such that the sum of the larger and three times the smaller is 234

viva [34]

Represent even numbers as "2n" since each is a multiple of 2.

Represent odd numbers as "2n+1" since each is one more than an even.

-----------------

Your problem:

smaller # : 2n

larger #: 2n+2

-------------------

EQUATION:

2n+2 + 3(2n) = 234

8n = 232

n = 29

---------

smaller = 2*29 = 58

larger = 2n+2 = 60

7 0

4 years ago

A cable car starts off with n riders. The times between successive stops of the car are independent exponential random variables

nikitadnepr [17]

Answer:

The distribution is $\frac{\lambda^{n}e^{- \lambda t}t^{n - 1}}{(n - 1)!}$

Solution:

As per the question:

Total no. of riders = n

Now, suppose the $T_{i}$ is the time between the departure of the rider i - 1 and i from the cable car.

where

$T_{i}$ = independent exponential random variable whose rate is $\lambda$

The general form is given by:

$T_{i} = \lambda e^{- lambda}$

(a) Now, the time distribution of the last rider is given as the sum total of the time of each rider:

$S_{n} = T_{1} + T_{2} + ........ + T_{n}$

$S_{n} = \sum_{i}^{n} T_{n}$

Now, the sum of the exponential random variable with $\lambda$ with rate $\lambda$ is given by:

$S_{n} = f(t:n, \lamda) = \frac{\lambda^{n}e^{- \lambda t}t^{n - 1}}{(n - 1)!}$

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3 years ago

The widths of two similar rectangles are 10 m and 15 m. What is the ratio of the perimeters? Of the areas?

vitfil [10]

Area and perimeter are in the ratio of 1:3. but if u mean to ask about the ratio of perimeters & areas of both triangles. the answer would be 1:1

6 0

3 years ago

9) The original price of a coffee table is d dollars. You use a coupon and buy the table for (d - 4)

Anit [1.1K]

Answer:

I dopnt know

Step-by-step explanation:

Im asking the same question lol

4 0

3 years ago

Read 2 more answers