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3 years ago

If you roll a number cube 30 times, how many times do you expect to roll a five

Mathematics

1 answer:

andrezito [222]3 years ago

5 0

Answer:

Step-by-step explanation:

There are 6 numbers on a die, one of them is 5 so we expect to get a five one of six times

P (5) = 1/6

If we roll the die 30 times, we expect to get a five 30 * 1/6 = 5 times

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Marlo uses 252 lb of gravel to cover a garden plot of 36 ft2. How many pounds of gravel does it take to cover one square foot? H

irakobra [83]

The area and the amount of gravel are illustrations of proportions.

7 lb will cover an area of 1 square foot, while 315 lb will cover an area of 45 square feet.

The given parameters are:

$252\ lb= 36ft^2$

The number of pound for an area of <em>1 square foot </em>is calculated as follows:

$x = 1ft^2$

So, we have:

$x = 1ft^2$

$252\ lb= 36ft^2$

Cross multiply

$x \times 36 = 252 \times 1$

Divide both sides by 36

$x = 7lb$

The area to be covered with 315lb gravel is calculated as follows:

$315lb = y$

So, we have:

$315lb = y$

$252\ lb= 36ft^2$

Cross multiply

$y \times 252 = 36 \times 315$

$y \times 252 = 11340$

Divide both sides by 252

$y = 45$

Hence, 7 lb will cover an area of 1 square foot, while 315 lb will cover an area of 45 square feet.

Read more about proportions at:

brainly.com/question/13114933

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Word form for 600,000+80,000+10

Arte-miy333 [17]

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eduard

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What is the answer to -6+2R+12R

Alik [6]

Answer:

R=0.42857

Step-by-step explanation:

ac/question, -6+2R+12R=0

14R=6

R= $\frac{6}{14}$

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