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Mars2501 [29]
3 years ago
14

Tanya have several different ways she likes to walk home. One route takes 20 minutes, two of the routes take 30 minutes, and two

take 40 minutes. Tanya randomly chooses a route to walk home. What is the probability, to the nearest percent, that it will take her 30 minutes to walk home?
A.) 20%
B.) 33%
C.) 40%
D.) 67%

Please explain answer for me :)
Mathematics
1 answer:
svp [43]3 years ago
6 0

Answer:

40%

Step-by-step explanation:

Tanya has a a choice of 5 different routes (1-20 mins, 2-30 mins, 2-40 mins).

How many routes can she take that will take her 30-mins to get home?

The answer is 2.

What's the probability she will take 2 of the 5 routes to get home?

The probability is 2/5 so 40%.

The rounding instruction was there to mislead you in this case :-)

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Simplify: 4^ sqrt 400/ 4^ sqrt 5 <br> SHOW WORK
USPshnik [31]

Given  

The equation is in the form

=\frac{4^{\sqrt{400}}}{4^{\sqrt{5}}}

Simplify the above equation

To proof

As given in the question the equation is written in the form

=\frac{4^{\sqrt{400}}}{4^{\sqrt{5}}}

By using the exponent property

when you divide powers with the same base you just have to subtract the exponents. i.e

\frac{y^{a}}{y^{b}} = y^{a-b}

y is not equal to zero.

Now apply this property to the above equation

=4^{\sqrt{400}- \sqrt{5}}

As

\sqrt{400} = 20

now put this in the above equation

we get

=4^{20- \sqrt{5}}

Hence proved


6 0
3 years ago
A box contains 14 nickels, 15 dimes and 6 pennies. if a coin is picked at random from the box, what is the average value of the
Sidana [21]

Answer:

$0.0646 is the expected value of the draw.

Step-by-step explanation:

1 nickel = 5 cents

1 dime = 10 cents

1 penny = 1 cent

Total number of coins = 14+15+6=35

Probability that a nickel is selected is = 14/35

Probability that a dime is selected is = 15/35

Probability that a penny is selected is = 6/35

So, the expected value of the draw will be =

\frac{14}{35}*5+\frac{15}{35}*10+\frac{6}{35}*1

\frac{70}{35}+\frac{150}{35}+\frac{6}{35}=\frac{226}{35}

= 6.457 cents ≈6.46 cents

So, in dollars it is = \frac{6.46}{100} = $0.0646

So, $0.0646 is the expected value of the draw.

5 0
4 years ago
The store had a sale on potatoes the original price was $2.50 per lb the sale price was $1.99 per lb how much would we pay for a
mel-nik [20]
You would multiply the # of pounds (5) by the price ($1.99). So, 5 x 1.99 = $9.95.
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3 years ago
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Anna [14]

Answer:

are you ok?

Step-by-step explanation:

why did you need help lol

5 0
3 years ago
Read 2 more answers
The question is in the picture ​
Lera25 [3.4K]
USE SOCRACTIC IT WOULD REALLY HELP WITH THIS QUESTION
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