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3 years ago

In a sample of 5000 flips of a fair coin, tails will always come up 2500 times.

Mathematics

1 answer:

rodikova [14]3 years ago

8 0

true or false? no question?

if so

Faults because 50% is based on each time you flip not the total amount

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The area of a circle, in terms of π, is 196π m2.<br> Find the value of the radius.

AleksandrR [38]

Step-by-step explanation:

if area of circle = pi times radius^2,

area of circle divided by pi = radius^2

so, square root (area of circle divided by 2) = radius.

so, 196pi = m2

approx 616

616=m2

sqrt 616 =m

approx value of radius is 25 or 24.8

pls mark this as brainliestttt

5 0

3 years ago

A rectangular box with a volume of 272ft^3 is to be constructed with a square base and top. The cost per square foot for the bot

ASHA 777 [7]

Answer:

The dimensions of the box is 3 ft by 3 ft by 30.22 ft.

The length of one side of the base of the given box is 3 ft.

The height of the box is 30.22 ft.

Step-by-step explanation:

Given that, a rectangular box with volume of 272 cubic ft.

Assume height of the box be h and the length of one side of the square base of the box is x.

Area of the base is = $(x\times x)$

$=x^2$

The volume of the box is = area of the base × height

$=x^2h$

Therefore,

$x^2h=272$

$\Rightarrow h=\frac{272}{x^2}$

The cost per square foot for bottom is 20 cent.

The cost to construct of the bottom of the box is

=area of the bottom ×20

$=20x^2$ cents

The cost per square foot for top is 10 cent.

The cost to construct of the top of the box is

=area of the top ×10

$=10x^2$ cents

The cost per square foot for side is 1.5 cent.

The cost to construct of the sides of the box is

=area of the side ×1.5

$=4xh\times 1.5$ cents

$=6xh$ cents

Total cost = $(20x^2+10x^2+6xh)$

$=30x^2+6xh$

Let

C $=30x^2+6xh$

Putting the value of h

$C=30x^2+6x\times \frac{272}{x^2}$

$\Rightarrow C=30x^2+\frac{1632}{x}$

Differentiating with respect to x

$C'=60x-\frac{1632}{x^2}$

Again differentiating with respect to x

$C''=60+\frac{3264}{x^3}$

Now set C'=0

$60x-\frac{1632}{x^2}=0$

$\Rightarrow 60x=\frac{1632}{x^2}$

$\Rightarrow x^3=\frac{1632}{60}$

$\Rightarrow x\approx 3$

Now $C''|_{x=3}=60+\frac{3264}{3^3}>0$

Since at x=3 , C''>0. So at x=3, C has a minimum value.

The length of one side of the base of the box is 3 ft.

The height of the box is $=\frac{272}{3^2}$

=30.22 ft.

The dimensions of the box is 3 ft by 3 ft by 30.22 ft.

7 0

3 years ago

what is the volume of a triangular prism that is 75 centimeters long and that has a base with an area of 30 square centimeters

pychu [463]

75 * 30= 2250 that's how u get the answer

3 0

3 years ago

Mr. Strand washed 2 - 5 of his laundry. His son washed 1 - 4 of it. Who washed most of the laundry? How much of the laundry stil

fredd [130]

Answer:

His son did.

Step-by-step explanation:

His son: 1/4 = 25%

Mr. Strand: 2/5 = 20%

They also need 55% more to wash or in other words 11/20.

7 0

3 years ago

What is the difference?

strojnjashka [21]

Answer:

1.8940279x10^9+27

Step-by-step explanation:

$5.972(10^{24} )-1.9(10^{27})\\5.972(1e+24) -1.9(1e+27)\\$

6 0

3 years ago