Can you please solve this please and thank you.

Half time of krypton 91 = 10s

this means, it reduces to half of the remaining in every 10s

So, In 10 sec , the mass remaining will be :

3/2 = 1.5

After 20 sec, the mass remaining will be :

0.75 g

After 30 sec, the mass remaining will be :

0.375

After 40 sec, the mass remaining will be :

0.1875 g

After 50 sec, the mass remaining will be :

0.09375 g

After 1 minute, the mass remaining will be:

0.046975 g

Answer:

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Step-by-step explanation:

so, he predicted he had 12 questions wrong.

that would have been a score of 38.

but he got 42.

that is a difference of 42-38 = 4.

now, accuracy could have different meanings like actual score vs. predicted score, or which questions were right or wrong (for real or predicted), or only looking at the questions that were right (real vs. predicted), ...

I assume it is the first one.

so,

100% = 38 (prediction)

1% = 100%/100 = 38/100 = 0.38

how many % are these 4 questions that his prediction was off from reality ?

4 / 0.38 = 10.52631579...

so, his prediction was off by about 10.53%

The thing dosnet show

Answer:

180

Step-by-step explanation:

[tex]16+16*5+7+7+7+7+7+7+7+7+7+7+7+7\\16+80+7+7+7+7+7+7+7+7+7+7+7+7\\16+80+84\\180[/tex]

Answer:

180

Step-by-step explanation:

Answer:

According to the question,

[tex]12x + 8x + 5x = 75[/tex]

_____________________

[tex]12x + 8x + 5x = 75[/tex]

[tex]25x = 75[/tex]

[tex]x = \frac{75}{25} [/tex]

[tex]x = 3[/tex]

Now,

[tex]12x = 36[/tex]

[tex]8x = 24[/tex]

[tex]3x = 15[/tex]

So,

75 in the ratio of 12 : 8 : 5 is

36, 24 and 15

Answer:

36 : 24 : 15

Step-by-step explanation:

sum the parts of the ratio, 12 + 8 + 5 = 25 parts

Divide the quantity by 25 to find the value of one part of the ratio

75 l ÷ 25 = 3 l , then

12 parts = 12 × 3 = 36 l

8 parts = 8 × 3 = 24 l

5 parts = 5 × 3 = 15 l

Step-by-step explanation:

multiplication

yep that is the answer

Answer:

multiplication should be used

Answer:

Or is separate

And is together

Answer:

24 m3.

Step-by-step explanation:

6 * 2 * 2.

Answer:

84 = g  

Step-by-step explanation:

(16 ÷ 4)(3 × 7) = g       Divide

   4(3 × 7) = g              Multiply

    4 × 21 = g               Multiply

        84 = g                Simply

Answer:

1)

Factors of 25:    1, 5, 25

Factors or 75:    1, 3, 5, 15, 25, 75

Multiples of 25:    25, 50, 75

Multiples of 75:    75, 150, 225

2)

Factors of 35:    1, 5, 7, 35

Factors of 45:    1, 3, 5, 9, 15, 45

Multiples of 35:    35, 70, 105

Multiples of 45:    45, 90, 135

3)

The factors of 21:     1, 3, 7, 21

The factors of 56:      1, 2, 4, 7, 8, 14, 28, 56

Multiples of 21:    21, 42, 63

Multiples of 56:     56, 112, 168

4)

The factors of 54:     1, 2, 3, 6, 9, 18, 27, 54  

The factors of 72:      1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

Multiples of 54:       54, 108, 162

Multiples of 72:        72, 144, 216

5)

The factors of 27:     1, 3, 9, 27

The factors of 36:     1, 2, 3, 4, 6, 9, 12, 18, 36

The multiples of 27:     27, 54, 81

The multiples of 36:     36, 72, 108

6)

The factors of 12:     1, 2, 3, 4, 6, 12

The factors of 16:     1, 2, 4, 8, 16

The multiples of 12:    12, 24, 36

The multiples of 16:     16, 32, 48

Answer:

The equation for the nth term of the arithmetic sequence is:

[tex]a_{n} = a + (n-1)d\\[/tex]

The [tex]a_{30}[/tex] is 140

Step-by-step explanation:

"a" represents the first term which is -5.

"d" represents the common difference which is 5.

To find the common difference, just subtract the 2nd and 1st term.

0 - (-5) = 5

Now put the values in the equation:

[tex]a_{n} = a + (n - 1)d\\a_{n} = (-5) + (n - 1)5[/tex]

We are finding the 30th term so just put 30 to the "n" to help us find the 30th term of the sequence.

[tex]a_{30} = -5 + (30-1)5\\a_{30} = -5 + (29)5\\a_{30} = -5 + 145\\a_{30} = 140[/tex]

So the 30th term is 140

Answer:

7:5

Step-by-step explanation:

Ratio between red and green marbles is simply the number of red marbles to the number of green marbles.

---------------------

35:25

To simplify it, you divide both of them by 5 (which is the highest common factor) to get

--------------------

7:5

Answer:

Im soooooo hungry ughhh

Step-by-step explanation:

Hi

Step-by-step explanation:

x* 2½ = 15/16

x * 5/2 = 15/16

x = 15/16*2/5

x = 3/8

Answer:

3/8

Step-by-step explanation:

Answer:

[tex]12 + 12 + 12 = 36 \\ \\ \\ i \: hope \: it \: is \: helpfull[/tex]

Answer:

7! = 5040

Step-by-step explanation:

7! is a factorial expression that can be solved as follows:

7 × 6 × 5 × 4 × 3 × 2 × 1 = 5040

Therefore, 7! = 5040

With a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the meanWith a population standard deviation of 10 and a sample size of 4, what is the standard error of the mean

Step-by-step explanation:

Answer: No

Step-by-step explanation:

you should know that 3/4 is the same as 0.75. -0.75 is smaller than -0.25 because when dealing with negative numbers, what would be the “smaller” number in positive negative integers is actually the larger number as it is closer to 0.

Answer:

-0.25 is greater than -0.75

Step-by-step explanation:

usually if they were positive 0.75 would be bigger but since there negative decimals, -0.25 is greater. By the way, -0.75 is -3/4.

Answer:

min: (-2;-6) & (1; 3/4); max: (0;2).

Step-by-step explanation:

1) f`(x)=3x³+3x²-6x;

2) f`(x)=0, ⇒ 3x³+3x²-6x=0;

3) 3x³+3x²-6x=0; ⇒ x(x²+x-2)=0; ⇒ x(x-1)(x+2)=0; ⇒ x₁=0; x₂=1; x₃=-2;

other steps are provided in the attachment.

Answer:

John: $80

Mary: $120

Step 1: Add the ratios (3 and 2).

=> 3 + 2 = 5

Step 2: Divide 200 by 5.

=> 200 ÷ 5

= 40

Step 3: Multiply.

=> Mary total: 40 x 3 = $120

=> John total: 40 x 2 = $80

Hoped this helped

Answer:

t is 19.

Step-by-step explanation:

Subtract 4 from both sides.

Next, multiply both sides by 19.

Answer: ask your teacher duh

Step-by-step explanation:

Answer:

7

Step-by-step explanation: u get 14 by multiplying 2 and 7 and u get 21 by multiplying 7 times 3

[tex]14 = 7 \times 2 \\\\21 = 3 \times 7\\\\GCF = 7[/tex]

Answer:

y= (10*x)+5.5

Step-by-step explanation:

B)

Answer:

y = 10x + 5.5

Step-by-step explanation:

We can write our equation in slope-intercept form, which looks like y = mx + b. "m" is our growth rate, and "b" is our y-intercept, or starting value.

So, let's fill in "m" first. What is our growth rate? Well, 10 inches per year. So, we can replace "m" with 10: y = 10x + b. But we have to figure out which number to replace "b" with. In this scenario, Sofia planted the maple tree when it was already 5.5 inches tall. So, when it grows 10 inches per year, the inches are being added to that original value. 5.5 is our starting value: y = 10x + 5.5. And that's our final equation.

Hopefully that's helpful! :)

Answer:

The answer is 4

Step-by-step explanation:

I did it and got it right

Please mark me as brainly

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Have a good day!

:)

Step-by-step explanation:

2 is the answer!!