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4 years ago

the length of a rectangle is 4 times it's width. the rectangle's width is 8 m. what is the area of the rectangle?

Mathematics

1 answer:

user100 [1]4 years ago

8 0

Area = Length x Width

4 times it's width
4x8=32
Length = 32
Width = 8

32 x 8 = 256

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A recent survey was conducted to compare the cost of solar energy to the cost of gas or electric energy. Results of the survey r

ICE Princess25 [194]

Answer:

The percentage of homes will have a monthly utility bill of more than $87

P(X>87) = 0.8413 X 100 = 84.13%

Step-by-step explanation:

Explanation:-

Given Mean of the Population =97

Standard deviation of the Population = 10

Let 'X' be the random variable in normal distribution

$z=\frac{x-mean}{S.D}$

$z=\frac{87-97}{10}$

Z= -1

The probability that homes will have a monthly utility bill of more than $87

P(X>87) = P( Z>-1) = 0.5 + A(-1)

= 0.5 + A(1) (∵A(-1)=A(1)

=0.5 + 0.3413

= 0.8413

The percentage of homes will have a monthly utility bill of more than $87

P(X>87) = 0.8413 X 100 = 84.13%

5 0

4 years ago

Of the 74 people who answered "yes" to a question, 15 were male. Of the 71 people that answered "no" to the question, 6 were mal

san4es73 [151]

Answer:

55.2%

Step-by-step explanation:

We have that 74 people answered yes and 71 answered no. So the total number of people who answered the question was 74 + 71 = 145.

Now, of those 145, 74 answering yes, then the probability of saying yes is:

P (Y) = 74/145

We know that 21 (15 + 6) are men, therefore the probability of being a man is:

P (M) = 21/145

Finally, we also know how many people answering that yes, they are men, they are 15, therefore the probability is:

P (Y and M) = 15/145

Finally, we use the "sieve" formula, for the probability that he is a man or that he answered yes.

P (Y or M) = P (Y) + P (M) - P (Y and M)

Replacing we have:

P (Y or M) = 74/145 + 21/145 - 15/145

P (Y or M) = 80/145

P (Y or M) = 0.552

In other words, the probability is 55.2%

7 0

3 years ago

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Morgarella [4.7K]

Answer:

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3 years ago

A bag has 5 yellow marbles, 3 red marbles and 2 blue marbles Quinn randomly picks a marble from the bag and returns it before an

Lelu [443]

Answer:

80 times

Step-by-step explanation:

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3 years ago

The length of a rectangle is 8 feet more than its width. If the width is increased by 4 feet and the length is decreased by 5 fe

alukav5142 [94]

X(x+8)=(x+4)(x+3)
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next width = 16

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3 years ago