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OLga [1]
3 years ago
9

Find out the cylinders volume whose height is 3 cm and radius 5cm

Mathematics
2 answers:
Studentka2010 [4]3 years ago
8 0
Volume = πr²h

Volume = π(5)²(3)

Volume = 75π = 235.62 cm³ (nearest hundredth)

----------------------------------------------
Answer: Volume = 235.62 cm³.
----------------------------------------------<span />
irina1246 [14]3 years ago
4 0

Answer:

235.62 give the other person brainliest, they did a bunch of work

Step-by-step explanation:


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1/8 of Tony's books are mystery books he has three mystery books how many books does Tony have an all
seropon [69]
1/8 of all=mystery
mystery=3

'of' means multiply
therefor
1/8 times all=3
multiply both sides by 8/1 to clear fracion
all=24


6 0
3 years ago
there are n counters in a bag. 4 of the counters are red and the rest are blue. Ross takes a counter from the bag at random and
Ainat [17]

Answer: n = 10.

Step-by-step explanation:

In the bag, we have n counters.

4 of the counters are red.

the rest are blue, then we have:

(n - 4) blue counters.

Now, the probability that Ross takes a blue counter from the bag is equal to the quotient between the number of blue counters (n - 4) and the total number of counters, n

Then the probability is:

p1 = (n - 4)/n

Now he draws another, and it must be blue again, then we can calculate the probability in the same way as above, but he already take a blue counter, so the number of blue counters is (n - 5) and the total number of counters is (n - 1)

The probability of this event is:

p2 = (n - 5)/(n - 1)

The joint probability (the probability that Ross takes two blue counters) is equal to the product of the individual probabilities, and we know that this is equal to 1/3, then we have the equation:

1/3 = ( (n - 4)/n)*((n - 5)/(n - 1))

Now let's solve this for n.

n*(n - 1)/3 = (n - 4)*(n - 5)

(n^2 - n)/3 = n^2 - 4*n - 5*n + 20

n^2 - n = 3*(n^2 - 9*n + 20)

n^2 - n = 3*n^2 - 27*n + 60

0 = (3*n^2 - n^2) - 27*n + n + 60

0 = 2*n^2 - 26*n + 60

The two solutions of this equation can be found with Bhaskara's equation:

n = \frac{-(-26) +- \sqrt{(-26)^2 - 4*2*60} }{2*2} = \frac{26+- 14}{4}

Then the two solutions are:

n = (26 - 14)/4 = 3

This is not an option, because we know for sure that we have 4 red counters, then this option can be discarded.

The other solution is:

n = (26 + 14)/4 = 40/4 = 10

Then we have n = 10, 10 counters in total.

4 0
3 years ago
In the last six months, Sonia's family used 529, 499, 651, 652, 1,163, and 310 minutes on their cell phone plan. To save money,
Tresset [83]

Answer:

They went over their goal for the last six months by 34 minutes per month.

Step-by-step explanation:

Mean of a data-set:

The mean of a data-set is the sum of all values in the data-set divided by the size of the data-set.

529, 499, 651, 652, 1,163, and 310 minutes on their cell phone plan.

The mean is:

M = \frac{529+499+651+652+1163+310}{6} = 634

By how many minutes did they go over their goal in the last six months?

The mean was of 634 minutes, and they wanted to keep it below 600. So

634 - 600 = 34

They went over their goal for the last six months by 34 minutes per month.

4 0
3 years ago
Select the correct answer.
asambeis [7]

Answer:

y=3x+4

Step-by-step explanation:

The equation of the straight line that passes through (-3,-5) with slope 3 can be found using

y = mx + b

where m=3 is the slope .

We substitute the slope to get:

y = 3x + b

We substitute the point to find b.

- 5 = 3( - 3) + b \\  - 5 =  - 9 + b \\ b =  - 5 + 9 = 4

The equation of the straight line is:

y = 3x + 4

3 0
3 years ago
Convert 60°F to degrees Celsius. If necessary, round your answer to the nearest tenth of a degree.
Luba_88 [7]
Answer: 60°F = 15.5°C
8 0
3 years ago
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