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3 years ago

How to solve ratio tables with decimals

Mathematics

1 answer:

DiKsa [7]3 years ago

3 0

0.7 is 0:7 in reatio

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In the united states , 13 out of every 20 cans are recycled what percent of cans are recycled

WARRIOR [948]

Answer:

75%

Step-by-step explanation:

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2 years ago

A bag contains 4 red marbles, 3 white marbles, and 7 blue marbles. You pick a marble without looking. Find the probability of dr

astra-53 [7]

The probability of drawing a white marble = $\frac{Number of white marbles}{Total number of Marbles}$

∴ the probability of drawing a white marble = ³/₁₄

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3 years ago

What is the slope of the line

Oksi-84 [34.3K]

Answer:

3/2

Step-by-step explanation:

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2 years ago

Suppose X has an exponential distribution with mean equal to 23. Determine the following:

e-lub [12.9K]

Answer:

a) P(X > 10) = 0.6473

b) P(X > 20) = 0.4190

c) P(X < 30) = 0.7288

d) x = 68.87

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

The probability of finding a value higher than x is:

$P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}$

Mean equal to 23.

This means that $m = 23, \mu = \frac{1}{23} = 0.0435$

(a) P(X >10)

$P(X > 10) = e^{-0.0435*10} = 0.6473$

P(X > 10) = 0.6473

(b) P(X >20)

$P(X > 20) = e^{-0.0435*20} = 0.4190$

P(X > 20) = 0.4190

(c) P(X <30)

$P(X \leq 30) = 1 - e^{-0.0435*30} = 0.7288$

P(X < 30) = 0.7288

(d) Find the value of x such that P(X > x) = 0.05

$P(X > x) = e^{-\mu x}$

$0.05 = e^{-0.0435x}$

$\ln{e^{-0.0435x}} = \ln{0.05}$

$-0.0435x = \ln{0.05}$

$x = -\frac{\ln{0.05}}{0.0435}$

$x = 68.87$

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2 years ago

Renting a canoe costs $5.00 per hour for each adult and $2.50 per hour for each child. One adult and two children decide to rent

s344n2d4d5 [400]

Answer:

The equation is equal to $c=10t$

Step-by-step explanation:

Let

c-----> the cost in dollars

t----> the time in hours

we know that

One adult and two children

$c=(1)5t+(2)2.5t\\ \\c=5t+5t\\ \\c=10t$

3 0

2 years ago