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Mazyrski [523]
2 years ago
6

David has a stack of 30 cards, which are numbered 1 through 30. what is the exact probability of randomly selecting a card from

the stack with a number that is even or is less than 10?
Mathematics
1 answer:
lorasvet [3.4K]2 years ago
8 0

Answer:

1/3 or 1:3

Step-by-step explanation:

since there is a 10/30 chance

to simplify divide by 2

10/30 ÷ 2/2 = 5/15

then divide by 5

5/15 ÷ 5/5 = 1/3

your answer is 1/3

another simple way to simplify

since there is a zero (0) in both the ones (1s) spot on both the numerator and denominator in 10/30, you may just cross out both zeros (0s) to simplify the value

10/30 simplified/taken away 0s = 1/3

hope this helps:)

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Circle towns limit form a perfectly circular shape that has a population of 20000 in the population density of 480 people per sq
Alex

Answer:

D =\frac{P}{\pi X^2}

And solving for the radius we got:

X = \sqrt{\frac{P}{\pi D}}

And replacing the data given we got:

X = \sqrt{\frac{480 \frac{people}{km^2}}{\pi *20000 people}}= 0.0874Km

And this value converted to meters is X = 87.40 m

Step-by-step explanation:

For this case we know the population size P = 20000 and we also know the population density D = 480 \frac{people}{km^2}

We can assume that the area is a circle. We also know that the formula for the population density is given by:

D= \frac{P}{A}

Where P represent the number of people and A the area. Since we are assuming a circle then the area is given by:

A = \pi X^2

With X the radius of the circle

And then the populationd density become:

D =\frac{P}{\pi X^2}

And solving for the radius we got:

X = \sqrt{\frac{P}{\pi D}}

And replacing the data given we got:

X = \sqrt{\frac{480 \frac{people}{km^2}}{\pi *20000 people}}= 0.0874Km

And this value converted to meters is X = 87.40 m

6 0
3 years ago
When evaluating the expression 3 x (3 + 12/3) - 4, Ryan began with 3 + 12. What was Ryan's mistake?
KIM [24]

Answer:

He has to divide 12/3 first

Step-by-step explanation:

it’s like pemdas you have to do that first then you go on to added the 3+ whatever 12/3 is

3 0
3 years ago
Read 2 more answers
A sale girl receive a 5% commission on all she self. how much she has to sell to receive $15​
ivann1987 [24]

Answer:

$300

Step-by-step explanation:

Sales x .05 commission = $15

sales=$15/.05

sales = 300

4 0
3 years ago
Find the length of GH
RoseWind [281]

Answer:

d = 7.28011, or

7.3

Step-by-step explanation:

3 0
2 years ago
in japan, farmers have created watermealons in the shape of rectangular prisms. Find The volume of a prism-shaped watermelon in
Lubov Fominskaja [6]
To find the volume (area) of the watermelon (rectangular prism), you use the formula L*W*H. You would replace the letters with numbers so it is 10*2/3*9. When you multiply those numbers, your area is 60 inches squared. Hope I helped!
8 0
3 years ago
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