Please help my last point and I’m confused show your work please

Answer and Step-by-step explanation:

For these, you have to make sure the same amount of moles are on each side of the chemical equation.

[tex]1ZN + 2HCL[/tex] → [tex]1ZnCL_{2} + H_{2}[/tex]

[tex]1SiO_{2} + 4HF[/tex] → [tex]SiF_{4} + 2H_{2} O[/tex]

[tex]12HCIO_{4} + 1P_{4} O_{20}[/tex] → [tex]4H_{3}PO_{4} + 6Cl_{2} O_{7}[/tex]

These are the balanced equations.

#teamtrees #WAP (Water And Plant)

Answer:

570

Step-by-step explanation:

Answer:

1/4

Step-by-step explanation:

3/12 =0.25

0.25 = 1/4

Answer:

there are three pizzas

it has to be shared among 12 peoples

so, 3/12 = 1/4.

Answer:

Slop is 3/4

Step-by-step explanation:

3x - 4y - 16 = 0

- 4y = -3 x + 16

y= ( -3 / -4 ) x + 16 / ( -4 )

y= (3/4) x - 4

Answer:

The percent decrease from 6 to 5.4 is 10%.

Step-by-step explanation:

Answer:

10.4 ft

Step-by-step explanation:

think of it like a right triangle like in the picture with 12ft ladder as the hypotenuse

a²+b²=c²

6²+b²=12²

b²= 12²-6² =108

b=√108 = 10.392≈ 10.4 ft

Answer:

22%

Step-by-step explanation:

looked it up duhhhhhhhh

Answer:

The answer is 22%

Step-by-step explanation:

I took the test

9514 1404 393

Answer:

  (d)  16

Step-by-step explanation:

Angles opposite sides of the same measure are congruent. Here, the triangle is isosceles, so the base angles are congruent:

  2x = 32

  x = 16 . . . . . . divide by 2°

Answer:

33 and 17

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

Answer:

120.91 grams

Step-by-step explanation:

multiply the initial amount by the percent that will remain to the power of n-1, n being the term number, or how many days that have passed.

f(x)=1000(0.85)^14-1

The mass of the radioactive sample at the beginning of the 10th day of the experiment is 221.30 grams if the mass was decreasing by 14% per day.

During exponential decay, a quantity falls slowly at first before rapidly decreasing. The exponential decay formula is used to calculate population decline and can also be used to calculate half-life.

We have:

Mass of the substance = 1000 grams

Rate of decay = 14% per day = 0.14

Let's suppose the mass is m at the beginning of the 10th day of the experiment.

The equation for the exponential decay:

[tex]\rm E = m(1-r)^t[/tex]

[tex]\rm m = 1000(1-0.14)^1^0[/tex]

m = 1000×0.22130

m = 221.30 grams

Thus, the mass of the radioactive sample at the beginning of the 10th day of the experiment is 221.30 grams if the mass was decreasing by 14% per day.

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Answer:

so the right answer is of option D

Step-by-step explanation:

Have a great day and hope this helps!!!

Answer:

The radius should be increased by 0.295 inches.

Step-by-step explanation:

Volume of a cylinder:

In a cylinder, in which the base has radius [tex]r[/tex], and the height is [tex]h[/tex], the volume is given by:

[tex]V = \pi r^{2}h[/tex]

In this question:

5 inch height, radius of 2.5 inches. So the volume is given by:

[tex]V = \pi (2.5)^2(5) = 31.25\pi[/tex]

We want to increase the volume by 25%.

So, the new volume is given by:

[tex]1.25*31.25\pi = 39.0625\pi[/tex]

With this volume, keeping the height, the radius should be of:

[tex]V = \pi r^{2}h[/tex]

[tex]39.0625\pi = 5\pi r^{2}[/tex]

[tex]r^{2} = \frac{39.0625}{5}[/tex]

[tex]r^{2} = 7.8125[/tex]

[tex]r = \sqrt{7.8125}[/tex]

[tex]r = 2.795[/tex]

The radius should be of 2.795 inches, which is an increase of 2.795 - 2.5 = 0.295 inches.

Answer:

https://slideplayer.com/slide/14286858/ copy paste the link it has a bunch of the answers but sadly no work on it.

Step-by-step explanation:

Answer:

Ths sum of the first 38 terms is [tex]\frac{1,045}{2}=522.5[/tex]

Step-by-step explanation:

Arithmetic Sequences

They are identified because any term n is obtained by adding or subtracting a fixed number to the previous term. That number is called the common difference.

The equation to calculate the nth term of an arithmetic sequence is:

[tex]a_n=a_1+(n-1)r[/tex]

Where

an = nth term

a1 = first term

r   = common difference

n  = number of the term

The sum of n terms of the sequence is

[tex]S_n=\frac{n}{2}( a_1 + a_n)[/tex]

The common difference is found by subtracting two consecutive terms:

[tex]r=a_{n+1}-a_n[/tex]

Using the first two terms:

[tex]r=a_2-a_1=5-\frac{9}{2}=\frac{1}{2}[/tex]

Now we find the term n=38

[tex]\displaystyle a_{38}=\frac{9}{2}+(38-1)\frac{1}{2}[/tex]

[tex]\displaystyle a_{38}=\frac{9}{2}+\frac{37}{2}=\frac{46}{2}=23[/tex]

The sum is:

[tex]\displaystyle S_{38}=\frac{38}{2}( \frac{9}{2} + 23)[/tex]

[tex]\displaystyle S_{38}=19( \frac{9+46}{2})[/tex]

[tex]\displaystyle S_{38}=19( \frac{55}{2})= \frac{1,045}{2}=522.5[/tex]

Ths sum of the first 38 terms is [tex]\mathbf{\frac{1,045}{2}=522.5}[/tex]

Answer:

16

Step-by-step explanation:

8x2

8x = 16

8 * 2 = 16

If "x" is equal 2.

Then 8 multiplied by 2 is equal to 16.

Christi can earn more interest if she invests $7,500 in Simple interest, 4%, 3.25 years, therefore, the correct option is c.

Simple interest is a method of calculating interest on an amount for n period of time with a rate of interest of r. It is calculated with the help of the formula,

[tex]SI = \dfrac{P \times R \times T}{100}[/tex]

where SI is the simple interest, P is the principal amount, R is the rate of interest, and T is the time period.

The simple Interest she is currently getting,

[tex]SI = \dfrac{P \times R \times T}{100} = \dfrac{\$7,500 \times 4 \times 3}{100} =\$900[/tex]

A.)

[tex]SI = \dfrac{P \times R \times T}{100} = \dfrac{\$7,500 \times 4.2 \times 3}{100} =\$945[/tex]

B.)

[tex]SI = \dfrac{P \times R \times T}{100} = \dfrac{\$7,500 \times 4.1 \times 3}{100} =\$922.5[/tex]

C.)

[tex]SI = \dfrac{P \times R \times T}{100} = \dfrac{\$7,500 \times 4 \times 3.25}{100} =\$975[/tex]

D.)

[tex]CI = P(1+\dfrac{R}{100})^t -P = \$7,500(1+0.04)^{2.75}-\$7500 = \$854.16[/tex]

Hence, Christi can earn more interest if she invests $7,500 in Simple interest, 4%, 3.25 years, therefore, the correct option is c.

Learn more about Simple Interest:

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Answer:

-32.37

Step-by-step explanation:

Answer:

-32.37

Step-by-step explanation:

Answer:

divide by 100 i think

Answer:

44 degrees, or A is your answer.

Step-by-step explanation:

You know angle A which is 46 and angle C which is 90, now all you have to do is solve to find angle B.

90+46=136

All the sides have to add up to 180 so simply do 180 - 136.

That will get you 44.

Answer:

a c 77

Step-by-step explanation:

Answer:

3 hours was spent on labor

Step-by-step explanation:

Key skills needed: Creating an equation, Solving an equation

1) The total cost is 329.00 (or 329). The parts are 125.00 (or 125), and the labor is 68 per hour.

2) If we say h is the number of hours of labor, then we can create this equation --> [tex]68h[/tex] (or 68 multiplied by "h") 68h would be the cost of labor, and we need to find the number of hours (h) as a number.

3) We can create this equation --> [tex]329 = 125 + 68h[/tex]

--> This equation can be made as the total cost (329) is equal to the parts (125) and the labor (68h)

4) Subtract 125 from both sides to get 68h by itself

--> 329 - 125 = 204 so 204 = 68h

--> Divide by 68 on both sides (204 divided by 68 is 3)

--> This means that h is 3.

Therefore, the number of hours spent on labor is 3.

Hope you understood and have a nice day!! :D

Answer:

On brainly we help each other what need help with

Step-by-step explanation:

Answer:

There shouldn't be any divison with this problem. If one gallon gets you thirty miles, then 13 gallons would get you 13 x 30 miles. There's no need for fractions. (He'd drive 390 miles on 13 gallons, by the way)

Step-by-step explanation:

Step-by-step explanation:

I didn't understand the question.

Do u want the function?

if so

[tex]y = ax + b[/tex]

at 0=0

at 1= 3

[tex]b = 0[/tex]

at 1=3

3=a

[tex]y = 3x[/tex]

if ur looking for something else, please tell me.

Answer:

angle 5, angle 4 and angle FVH.

Step-by-step explanation:

V is the highest point for all of these angles.

Answer:

1•2n

Step-by-step explanation:

Given the sequence if numbers

1 2 , 1 4 , 1 6 , 1 8 , 1 10 , ...

You will see that 1 is common to all the numbers, the other part of the sequence are in arithmetic progression and they are

2,4,6,8,10...

The nth term of an AP is expressed as

Tn = a+(n-1)d

a is the first term

n is the number of terms

d is the common difference

a = 2

d = 4-2 = 6-4 = 8-6 = 2

Substitute into the formula

Tn = 2+(n-1)2

Tn = 2+2n-2

Tn = 2-2+2n

Tn = 2n

Hence the nth term of the sequence is 1•2n