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2 years ago

What is the probability that a number selected is at random from the numbers 1- 15 is a prime number?

1 answer:

7 0

So there is 15 different outcomes which we want 6 of them 2, 3, 5, 7, 11 all prime numbers so a 6/15 chance we’d pull a prime number
6/15 or 40% chance we’d pull a prime number out of the bag

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URGENT ANSWER FAST PLEASE

xeze [42]

410.3ft^3. is correct

volume of the sphere with 3ft radius :
$\frac{4 \times \pi \times 3 \times 3 \times 3}{3} = 113$

volume of the sphere with 5ft radius:
$\frac{4 \times \pi \times 5 \times 5 \times 5}{3} = \frac{1570}{3} = 523.3$

difference
$523.3 - 113 = 410.3$

good luck

7 0

3 years ago

Plllzzz im new and i neeed help

ella [17]

Answer:

4082

Step-by-step explanation:

Given

The composite object

Required

The volume

The object is a mix of a cone and a hemisphere

Such that:

Cone

$r = 10cm$ ---- radius (r = 20/2)

$h = 19cm$

Hemisphere

$r=10cm$

The volume of the cone is:

$V_1 = \frac{1}{3}\pi r^2h$

$V_1 = \frac{1}{3}\pi * 10^2 * 19$

$V_1 = \frac{1900}{3}\pi$

The volume of the hemisphere is:

$V_2 = \frac{2}{3}\pi r^3$

$V_2 = \frac{2}{3}\pi 10^3$

$V_2 = \frac{2000}{3}\pi$

So, the volume of the object is:

$V = V_1 + V_2$

$V = \frac{1900}{3}\pi + \frac{2000}{3}\pi$

$V = \frac{3900}{3}\pi$

$V = 1300\pi$

$V = 1300 * 3.14$

$V = 4082$

8 0

3 years ago

A fancy watch was originally priced at $50 but went on sale for 20% off. If Ernesto bought

Viefleur [7K]

Answer:

$46

Step-by-step explanation:

4 0

3 years ago

Maurice has 76 postcards in all. The ratio of the number of postcards he has received to the number of postcards he has bought i

nexus9112 [7]

Answer:

50 but if its not an estimate 50.6 i would try 50 first

Step-by-step explanation:

also brainiest plz

4 0

2 years ago

Select the equation of the line that passes through the point (3, 5) and is perpendicular to the line x = 4. (2 points)

inn [45]

Perpendicular lines have opposite reciprocal slopes.

x = 4 has a slope of undefined since it is a vertical line.

It's undefined because 1/0 = undefined. We can't divide by 0.

The opposite reciprical of 1/0 is -0/1, which equals to 0.

Any line with a slope of 0 is:

y = 0x + b
y = b

This line goes through the point of (3, 5).

Since the equation starts with y = something, we have to use the y-value of the point it goes through. The point is in the form of (x, y).

5 is in the y-value.

The equation of the perpendicular line is y = 5.

7 0

3 years ago