3 years ago

Robert read 20 pages out of a 300 page book. What percent has he read ? What percent does he still have to read ?

1 answer:

6 0

Answer: he has read 15% and still needs to read 85%

Step-by-step explanation: 300/20 is 15 so that’s the percent he has read. 100-15=85 so that’s the percent he still has left to read

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Write a system of equations and solve

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$c+b=7$
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$c+b=7$ --> $c=7-b$
$5c+45b=195$

$5(7-b)+45b=195$
$35-5b+45b=195$
$35+40b=195$
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$b=4$

$c+(4)=7$
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3 years ago

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3 years ago

For each day that Sasha travels to work, the probability that she will experience a delay due to traffic is 0.2. Each day can be

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Answer:

0.8213

Step-by-step explanation:

-This is a binomial probability problem given by the function:

$P(X=x)={n\choose x}p^x(1-p)^{n-x}$

Given that n=21 and p=0.2, the probability that she experience a delay on at least 3 days is calculated as:

$P(X=x)={n\choose x}p^x(1-p)^{n-x}\\\\P(X\geq 3)=1-P(X$

Hence, the probability that she experience delay on at least 3 days is 0.8213

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4 years ago

What is the length, in feet, of the hypotenuse of a right triangle with legs that are 3 feet long and 4 feet long? Question 10 o

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3 years ago

Identify the triangle that contains an acute angle for which the sine and cosine ratios are equal.

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Answer:

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Step-by-step explanation:

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