Please answers question 5 (the line under H is labeled E, just got cut off the picture

Answer:

[tex]0.625kg[/tex]

Step-by-step explanation:

we are given half-life of PO-210 and the initial mass

we want to figure out the remaining mass after 420 days

in order to solve so we can consider the half-life formula given by

[tex] \displaystyle f(t) = a {0.5}^{t/T} [/tex]

where:

since it halves every 140 days our T is 140 and t is 420. as the initial mass of the sample is 5 our a is 5

thus substitute:

[tex]\displaystyle f(420)=5\cdot{0.5}^{420/140}[/tex]

reduce fraction:

[tex]\displaystyle f(420)=5\cdot{0.5}^{3}[/tex]

By using calculator we acquire:

[tex]\displaystyle f(420)=0.625[/tex]

hence, the remaining sample after 420 days is 0.625 kg

Answer:

Bob = 4500

Al = 6300

carlo = 7200

Step-by-step explanation:

the following equations can be derived from the question

A = B + 1800 equation 1  or A - B = 1800

C = 7200 = 2/3 (A + B)  equation 2

where A = Al's score

B = Bob's score

C = Carlo's score

Make A + B the subject of the formula in  equation 2

A + B = 10,800  equation 3

subtract equation 1 from 3

2B = 9000

B = 4500

Substitute for B in equation 1

A = 4500 + 1800 = 6300

Answer:

The awnser is 2432

Step-by-step explanation:

12x28x22= 2432

Answer:

11 cats

Step-by-step explanation:

Given :

Jane's initial = 23

My initial = 2

Jane gives out 5 cats to me ;

Jane's new = 23 - 5 = 18

My new = 2 + 5 = 7

Number of cats Jane has than me :

Jane's new - My new

18 - 7 = 11 cats

Second question is incomplete. We aren't told what to calculate.

Answer:

0.50

Step-by-step explanation:

X ___ - 5 ___ 3 __ - 2 __ 0 __ 12 __ 3

P(x) __0.17_0.13_0.33 _0.16 _0.11 _0.10

P(x <0) = p(x = - 2) + p(x = - 5)

P(x < 0) = 0.33 + 0.17

P(x < 0) = 0.50

Answer:

the answer is 0.79

Step-by-step explanation:

.17+.13+.33+.16=0.79 they are asking for less then or equal to 0 so just add all the percents of those numbers and boom hope that helped :)

Answer:

19/22

Step-by-step explanation:

cc = 9

sand = 10

pb = 3

total = 22

P(not pb) = 19/22

Answer:

4,800 loaves.

Step-by-step explanation:

Solve by utilizing ratios and cross-multiplication.

Answer:

<1 = 112degrees

<2 = 33degrees

Step-by-step explanation:

From the figure, the sum of interior angles of the larger triangle is equal to the exterior, hence;

<1 + 15 = 127

<1 = 127 - 15

<1 = 112degrees

For the smaller triangle;

<1 = <2 + 79

112 = <2 + 79

<2 = 112-79

<2 = 33

Hence the measure of <2 is 33degrees

Answer: A: 30

Step-by-step explanation: 2 hours in minutes is 120 minutes.

(60 minutes is in an hour so multiply 60 * times 2=120)

120 divided by 4 is 30. You're splitting 120 minutes into 4 pieces.

30 is the answer. Happy Women's Month! #BeBrainly

Answer:

Actual distance between the two cities given on the map = 78.0 miles

Step-by-step explanation:

Scale used for the actual distance between two cities on a map is,

5 in. = 15 mi.

[tex]\frac{5}{15}[/tex] in. = [tex]\frac{15}{15}[/tex] mi.

1 mi. = [tex]\frac{1}{3}[/tex] in.

1 inch = 3 miles

Therefore, 26 inches on the map = 26 × 3

                                                        = 78 miles

Therefore, actual distance between the two cities given on the map = 78.0 miles

Answer:

Step-by-step explanation:

This is just simple addition so there really isn't anything to talk about.

Just note that -5 1/2+6 3/4=1 1/4.

Then, we do 1 1/4+(-4 1/4)

This is just -3.

Answer:

Step-by-step explanation:

The required mass of reactants can be computed from the number of moles of product.

  moles of ZnCl₂ = (1.5 g)/(136.282 g) ≈ 0.0110066 moles

Then the mass of Zn required is ...

  mass of Zn = (0.0110066 mol)(65.382 g/mol) = 0.71963 g

Two moles of HCl are used in the reaction with each mole of Zn, so the mass of HCl required is ...

  mass of HCl = 2(0.0110066 mol)(36.458 g/mol) = 0.80256 g

_____

Comment

The discrepancy in the last two decimal places of the weights above versus the calculator output below comes from rounding of moles of Zn to 4 significant digits, instead of 5 or more. The number of moles of ZnCl₂ is closer to 0.0110066.

Answer:

C

Step-by-step explanation:

Answer:

x² + y² = 4

Step-by-step explanation:

We need to write the standard equation of circle with , centre (0,0) and radius 2 unit . The Standard equation of the circle ⭕ is ,

=> ( x - h)² + (y -k)² = r²

=> ( x -0)² + (y-0)² = 2²

=> x² + y² = 4 .

Answer:

every 2.5 kilometers is another 4 miles

Step-by-step explanation:

by looking at the chart you can see that the kilometers raise by 2.5 every 4 miles.

Answer:

6=AB

8=BC

AC =

formula=H²=P²+B²

H=AC

P=BC

B=AB

H²=8²+6²

H²=64 +36

H²=100

H=10

Answer:

Step-by-step explanation:

Slope= 10-4/2-0=3 y= 3x+4  (10= 3(2)+4

Answer:

a = 0, b = 7

a = 1, b = 6

a = 2, b = 5

a = 3, b = 4

a = 4, b = 3

a = 5, b = 2

a = 6, b = 1

a = 7, b = 0

Step-by-step explanation:

the sum of a and b must equal 7 because 4 x 7 = 28

Answer:

$567 after tax

Step-by-step explanation:

first, let's multiply 525 by 0.08 because he paid 8% (0.08) of 525 in tax.

525(0.08)= 42

now, let's add them together, because the question asks for the total cost.

525+42=567

$567 after tax

Answer:

the answers are b and c

Step-by-step explanation:

b

[tex]12x + 24y = \\ 4(3x + y)[/tex]

c

[tex]2(6x + 12y) = \\ 12x + 24y = \\ 4(3x + 6y)[/tex]

Answer:(2) (3) (4)

Step-by-step explanation:

Answer:

I dont under stand is this in high school or college lol

Answer:

15

Step-by-step explanation:

Answer:

x = 15

Step-by-step explanation:

We know that sum of interior angles of a triangle is 180°, so;

(60) + (60) + (8x - 60) = 180

120 + 8x - 60 = 180

60 + 8x = 180

8x = 120

x = 15

Hope this helps!

Answer:

Sea Travels

Step-by-step explanation:

Hope this helps

Answer:

Crossing a land bridge.

Step-by-step explanation:

We that what I think they would do.

Answer:

1. 2

2. 5.2

3. (c * 2) - 3= a

4. ($85 + $35 * h)

Step-by-step explanation:

1. |4−2| (simplified)

= |2|

=2

2. 2a^2 = 5.2

(22)(1.3)

=(4)(1.3)

=5.2

(2.6 - (2*1.3))=

5.2 - (2.6 - 2.6) = 5.2

3. (c * 2) - 3= a

4. ($85 + $35 * h)

Answer:

jdkkdksmsmsmsksksksksksmaMmamMamnz

Step-by-step explanation:

nnznznznznxnxnxnsnskakakakakakzznnznanananaan

Answer:

Its letting me answer now, so $2,666!

Step-by-step explanation:

First, you wanna find out how much money they have saved. So, since they saved $300 a month, and shes 15, to find out how much they have we have to multiply 300 by the amount of months. Shes 15 and there are 12 months in a year, so 15 x 12 = 180. So thats 180 months, so, 180 x 300 = 54,000. That means so far they have saved 54,000. Well, we need to find how much more money they need. So, the total 150,000 - 54,000 = 96,000. They need 96,000 more dollars. So, lets divide that by 3 years, which is 36 months, since they only have that much time to save. 96,000/36 = 2,666 dollars. I hope that helps you understand! I would really appreciate it if I could have brainliest!