A radioactive material has a half life of 7 minutes, how long until there is 5% of the material remaining?

Answer:

BCE

Step-by-step explanation:

The missing number in the sequence is 52.

In order to determine the missing number, the pattern in the sequence has to be determined.

The difference between the second and first number is 144 - 127 = 17

The third number is 3 times smaller than the second number: 144 / 48 = 3

The difference between the fourth number and the third number is 66 - 48 = 18.

The fifth number is 2 times smaller than the fourth number: 66/33 = 2

Based on this sequence, the sixth number would be 19 more than the fifth number. 33 + 19 = 52

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Using statistical concepts, it is found that the variance for this data set is of 22 oz squared.

From the second bullet point, the variance can also be interpreted as the sum of squared deviations divided by the sample size.

In this problem, the sum of squared deviations is 220 and the sample size is 10, hence, the variance for this data set is of 22 oz squared.

You can learn more about the mean and the variance of a data-set at https://brainly.com/question/18087235

Answer:

Common factor of 4
Simplest terms is 16/27

Step-by-step explanation:

Let's find the factors of both numbers

64:

108:

The greatest common factor is 4

The fraction in simplest terms would be [tex]\frac{64}{108}*\frac{4}{4} = \frac{16}{27} \text{ cross reduce}[/tex]

-Chetan K

By taking the product of the two fractions we will see that the number that goes in the green box is a 6.

We only can add two fractions if we have the same denominator in both of them, here we want to transform -2/3 in an equivalent fraction, such that the denominator is 9, so we multiply both the numerator and denominator by 3.

So we need to solve:

[tex]\frac{-2}{3}*\frac{3}{3} = \frac{-2*3}{3*3} = \frac{-6}{9}[/tex]

From that, we can conclude that the number that goes in the green box is 6.

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Alex needs a score of about 70 to be in the top 20% of the distribution

The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:

z = (x - μ)/σ

Where x is raw score, μ is mean and σ is standard deviation.

Given that μ = 62, σ = 6, z = 1.28, hence:

1.28 = (x - 62) / 6

x = 69.68

Alex needs a score of about 70 to be in the top 20% of the distribution

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Answer:

the 2nd, 3rd, and 5th option

Step-by-step explanation:

Answer:

7 ÷ 4/5 is 8.75 as a decimal or 8 3/4 as a fraction

Answer:

8¾

Step-by-step explanation:

7÷ 4/5

7 × 5/4

= 35/4

= 8¾

Answer:

-7.65

Step-by-step explanation:

Answer:

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Answer:

y = (0, -21)

Step-by-step explanation:

Could i get brainliest?

Answer:

[tex]y=\dfrac49x[/tex]

Step-by-step explanation:

Let [tex](x_1,y_1)[/tex] = (45, 20)

Let [tex](x_2,y_2)[/tex] = (72, 32)

using slope formula to find slope [tex]m[/tex]:

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{32-20}{72-45}=\dfrac49[/tex]

using point-slope formula:

 [tex]y-y_1=m(x-x_1)[/tex]

[tex]\implies y-20=\dfrac49(x-45)[/tex]

[tex]\implies y-20=\dfrac49x-20[/tex]

[tex]\implies y=\dfrac49x[/tex]

Answer:

The dimension of the room is Length of 5m and Width of 8m

Step-by-step explanation:

Formula for perimeter of a rectangle is;

P = 2(L + W)

Where;

L is length

W is width

We are given;

Width; W = 1.6L

Perimeter; P = 26 m

Thus;

2(1.6L + L) = 26

2(2.6L) = 26

5.2L = 26

L = 26/5.2

L = 5 m

W = 1.6 * 5

W = 8 m

Answer:

90% is close to 75

Step-by-step explanation:

90% of a number would be 3 times 30% of a number. As a result we can assume 90% of the number would be around 3(25) or 75

Acceleration is the rate of change of velocity over time

His final velocity is 14.4 meters per second

From the question, we have:

Using the first equation of motion, we have:

[tex]v = u + at[/tex]

So, the equation becomes

[tex]v = 0 + 1.8 * 8[/tex]

[tex]v =14.4[/tex]

Hence, the final velocity is 14.4 meters per second

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Answer:

1. x = 62.7 , y = 12.4

2. x = 5.9 , y = 19.2

Step-by-step explanation:

sorry i dont have the time to explain...

Answer:

5. a) 2.140 + 1.725 = 3.865

b) 29.99 + 1.42 = 31.41

c) 6.157 - 1.009 = 5.148

6) 7.4 - 0.0022 = 7.2978 ✅

7.39 - 0.0012 = 7.3888

7. 140minutes / 2 hours and 20 minutes

Answer: 81/8 kg

Step-by-step explanation:

6 + 3/4 = 27/4

1 + 1/2 = 3/2

27/4 x 3/2 = 81/8

27/4*3/2=33/4 kg of apples

Answer:

heyy here's your answer hope it helps

Answer:

See below.

Step-by-step explanation:

I assume the fraction 3/5 is raised to the 3rd power.

I assume this is the given expression.

[tex] (\dfrac{3}{5})^3 [/tex]

The base is 3/5    True

The base is 3     False

The exponent is 3    True

The expanded form is [tex] \dfrac{3}{5} \times \dfrac{3}{5} \times \dfrac{3}{5} [/tex]       True

The expanded form is [tex] \dfrac{3 \times 3 \times 3}{5} [/tex]     False

[tex] (\dfrac{3}{5})^3 = \dfrac{9}{15} [/tex]      False

[tex] (\dfrac{3}{5})^3 = \dfrac{27}{125} [/tex]      True

Answer:

ok so first we have to find out what the sample size is so

28+36+48+63=175

then lets find what percentage 28 is of 172

16.28

so ten lets find out how many that is out of the 1800

1800*0.1628=293.04

293 people will like potato chips

Hope This Helps!!!

[tex]\huge \text{Hello there! :)}[/tex]

Answer:

130 cents, or $1.30.

Step-by-step explanation:

To find the total cost of the meal, add the costs of each product.

Since the cost of the sandwich was 80 cents, the cost of the milk was 20 cents and the cost of the pie was 30 cents, then the total cost of the meal (in cents) is:

[tex]80+20+30[/tex]

Add the numbers from left to right. Since 80+20 is equal to 100, then:

[tex]80+20+30=100+30[/tex]

Finally, notice that 100+30 is equal to 130:

[tex]100+30=130[/tex]

So, the total cost of the meal was 130 cents. Each 100 cents is equal to 1 dollar. Then, 130 cents is the same as $1.30.

Therefore, the cost of the meal was 130 cents, or $1.30.

It was a pleasure helping you today! :)

[tex]\huge \text{Thanks for choosing Brainly!}[/tex]

Answer: $1.30

Step-by-step explanation:

Given :difference between 2 whole number = 66ratio of the 2 whole number =2:5Let:1 whole number be 2x2 whole number be 5xA/Q

difference between 2 whole number = 66

Let's turn it into algebraic equation:

5x - 2x = 663x= 66x =66 /3x =22

Now Let's put value of x to find two whole numbers

Finaly :1 whole number = 2x1 whole number = 2×221 whole number =44

2 whole number = 5x2 whole number = 5×222 whole number = 110

Answer:

About 718.0133  cm³

Step-by-step explanation:

The crucial part is to take V=4/3πr³ and multiply that by 1/2 (or divide by 2) This is because it is asking for half a sphere, which represents a bowl.

You plug in your values, which will look like: (1/2)(4/3)π(7)³. (Remember to insert 7 not 14 since it's asking for radius).

________________________________________________________

7 cubed is 343,

343 * 2/3 is about 228.66

228.66 times 3.14 is about 718.0133

-> or just 718 cm³

[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]

Here's the solution :

[tex]\qquad \sf  \dashrightarrow \: \cos(543 \degree) [/tex]

[tex]\qquad \sf  \dashrightarrow \: \cos( 360 \degree+ 183 \degree)[/tex]

[tex]\qquad \sf  \dashrightarrow \: \cos(183 \degree) [/tex]

[tex]\qquad \sf  \dashrightarrow \: \cos(180 \degree + 3 \degree) [/tex]

[tex]\qquad \sf  \dashrightarrow \: - \cos(3 \degree) [/tex]

Therefore, the correct choice is D

Answer:

Here to get the points thanks for recommending this ur so nice.

Step-by-step explanation:

Answer:

10 sq cm

Step-by-step explanation:

if the area of this rectangle is 6, then the sides must be 3 by 2 since
3+3+2+2 = 10 cm

Answer:

1.14 and -2.64

Step-by-step explanation:

Answer:

The height of feet would be 6.666 just be a line above the second 6 and inches would be 960.