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yulyashka [42]
3 years ago
10

The rate for mailing an envelope is $0.80 per ounce. Choose a function rule that represents the total cost, c(w), to mail an env

elope weighing w ounces. How much will it cost to mail an envelope that weighs 5 ounces?
Mathematics
2 answers:
ANTONII [103]3 years ago
8 0

Answer:   c(w)  = 0.80 w       and  the cost of 5 ounces is $4

Step-by-step explanation:

To solve this we can simply use proportionality

from the question,

$0.80    =     1   ounce

c(w)         =     w

cross multiply

c(w)   =  $0.80 w

Therefore a function rule that represents  the  cost c(w)   is $0.80 w

For the second part of the question, we are to find the cost of an envelope that weighs 5 ounce

we have different way of doing this, the first of which is to just use our function rule;

c(w)   =  $0.80 w

we substitute w=  5 into the function. Hence;

c(5)   =   $0.80 × 5   =   $4

OR

We can use a longer method;

let x = the cost of 5 ounces

$0.80   =   1   ounce

  x         =    5 ounces

cross multi[ply

x =   $0.80   ×   5  =    $4

Therefore, the  cost of mailing an envelope that weighs 5 ounces is $4.  

lana66690 [7]3 years ago
7 0
$0.80 per ounce.

for w ounces, cost will be:  0.80*w = 0.80w

Therefore c(w) = 0.80w

The cost for 5 ounces = 0.80*5 = 4.00

Cost for 5 ounces = $4.00

Hope this helps.
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According to the graph, what is the value of the constant in the equation below?
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According to the graph, the value of the constant in the equation below is 80 and is denoted as option D.

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We can pick any point(4,20) on the graph.

20 = c/ 4

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A production process is known to produce a particular item in such a way that 5 percent of these are defective. If two items are
IRINA_888 [86]

Answer:

0.0025 = 0.25% probability that both are defective

Step-by-step explanation:

For each item, there are only two possible outcomes. Either they are defective, or they are not. Items are independent of each other. So we use the binomial probability distribution to solve this question.

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The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

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In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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And p is the probability of X happening.

5 percent of these are defective.

This means that p = 0.05

If two items are randomly selected as they come off the production line, what is the probability that both are defective

This is P(X = 2) when n = 2. So

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