Solve every last one with step by step for each one Show your work and steps and answers due today. Must do all problems for brainliest. Must do 8-12

Answer:

False

Step-by-step explanation:

V = 3.14 x r^2 h = 3.14 x 7^2 x 4 = 615.75216

Answer:

C. All real number between -1 and 1 including -1 and 1

Step-by-step explanation:

I calculated it logically

Answer:

c) All real numbers between -1and 1 including -1and1

hope it helps.

Answer:

area of trapezium in terms of x=1/2*x(x+3+x+1)

Step-by-step explanation:

Answer:

(x^2 + 2x) cm^2

Step-by-step explanation:

Area of trapezium = 1/2 (a+b)h

= 1/2 [(x+3)+(x+1)] (x)

=1/2 (2x+4)(x)

= 1/2 (2x^2 + 4x)

= x^2 + 2x

Answer:

22

Step-by-step explanation:

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

A graphing calculator does this nicely.

Answer:

8

Step-by-step explanation:

volume of cube = side lenght ^3

= 2^3

= 8cubic inch.

Answer:

60%

Step-by-step explanation:

15/25=.6 = 60%

you say 15 divided by 100 multiplied by 25

Answer:

G)

Step-by-step explanation:

3% of 8000 is 240

now multiply it by 4 (years) and you get 940

Answer:

Step-by-step explanation:

Ap classroom

Answer:  a = 2.8

Step-by-step explanation:

3/4 (8a + 12) = 25.8

(3/4 * 8a) + (3/4 * 12) = 25.8

6a + 9 = 25.8

6a = 16.8

a = 2.8

Hope this helped! :)

Answer:

3/4 (8a + 12) = 25.8

(3/4 × 8a) + (3/4 × 12) = 25.8

a = 2.8

Hope this helps and have a AMAZING day :D

Answer:

[tex] V_{cylinder} =16,579.2\: in^3 [/tex]

Step-by-step explanation:

Inner radius [tex] (r_1)[/tex] = 20/2 = 10 in

Outer radius [tex] (r_2)[/tex] = 24/2 = 12 in

Height of the cylinder (h) = 120 in

[tex] \because V_{cylinder} =\pi( r_2^2-r_1^2) h[/tex]

[tex] \therefore V_{cylinder} =3.14(12^2-10^2) 120[/tex]

[tex] \therefore V_{cylinder} =376.8(12^2-10^2) [/tex]

[tex] \therefore V_{cylinder} =376.8(144-100) [/tex]

[tex] \therefore V_{cylinder} =376.8(44) [/tex]

[tex] \therefore V_{cylinder} =16,579.2\: in^3 [/tex]

Answer:

Q1 = 23 ; median = 28 ; Q3 = 36

TOP 25% = 3 students (Pauleen ; Vic and Tito).

Extra credit students : (students whose score range between 23 and 36. (score of 23 is not included).

Remediation = 4 students (Pia, Joey, Ryan and Allan

Step-by-step explanation:

Given the scores :

35, 23, 42, 36,36,27,42,28,35,18,42,25,27,18,20

Ordering the scores in ascending order :

18, 18, 20, 23, 25, 27, 27, 28, 35, 35, 36, 36, 42, 42, 42

The lower quartile :

Q1 = 1/4 * (n+1)th term

Q1 = 1/4 * 16 = 4th term

Q1 = 23

The median :

Q2 = 1/2 * (n+1)th term

Q2 = 1/2 * 16 = 8th term

Q2 = 28

The upper quartile :

Q3 = 3/4 * (n+1)th term

Q3 = 3/4 * 16 = 12th term

Q3 = 36

The top 25% refers to the student who scored beyond the 75 percentile score :

Number of students = (15th - 12th) = 3 students students who scored 42

Pauleen ; Vic and Tito.

The middle 50% gets extra credit : This is the interquartile range :

This are the students whose score range between 23 and 36. (score of 23 is not included)

Students who have to attend the remedial class are those in the lower quartile, student with score of 23 and below.

4 students and they are : Pia, Joey, Ryan and Allan

Answer:

2048 I think

Step-by-step explanation: 8 to the power of 3 times 4

Answer: No

Step-by-step explanation: No, because in order for it to be equivalent, it has to be 60:80 = 60 to 80.

Answer: (2, -1) is where they intersect.

Answer:

can you please specify which is the base , height and the boundary...

The area of a trapezium is 112.5 square centimeters.

An open, flat object with four straight sides and one set of parallel sides is referred to as a trapezoid or trapezium. A trapezium's non-parallel sides are referred to as the legs, while its parallel sides are referred to as the bases.

Given:

The parallel sides of the trapezium are 9 cm and 6 cm respectively

and the distance between these sides is 15 cm.

We know that,

Area of a trapezium=  1/2 × Sum of parallel sides × distance between them.

The area of a trapezium = 1/2 x 15 x 15

The area of a trapezium = 112.5 square centimeters.

Therefore, the area is 112.5 square centimeters.

To learn more about the trapezoid;

https://brainly.com/question/8643562

#SPJ2

One simple kind of transformation involves shifting the entire graph of a function up, down, right, or left. The simplest shift is a vertical shift, moving the graph up or down, because this transformation involves adding a positive or negative constant to the function.

Answer:

This situations represents the depth of the lake after t years.

The rate of decay is equal to 0.02 a year.

So the depth of the lake each year is 0.98 times the depth in the previous year.

It will take 5.77 years for the depth of the lake to reach 26.7 meters.

Step-by-step explanation:

Exponential equation of decay:

The exponential equation for the decay of an amount is given by:

[tex]D(t) = D(0)(1-r)^t[/tex]

In which D(0) is the initial amount and r is the decay rate, as a decimal.

A lake currently has a depth of 30 meters. As sediment builds up in the lake, its depth decreases by 2% per year.

This means that [tex]D(0) = 30, r = 0.02[/tex]

So

[tex]D(t) = D(0)(1-r)^t[/tex]

[tex]D(t) = 30(1-0.02)^t[/tex]

[tex]D(t) = 30(0.98)^t[/tex]

This situation represents

The depth of the lake after t years.

The rate of growth or decay, r, is equal to

The rate of decay is equal to 0.02 a year.

So the depth of the lake each year is times the depth in the previous year.

1 - 0.02 = 0.9

So the depth of the lake each year is 0.98 times the depth in the previous year.

It will take between years for the depth of the lake to reach 26.7 meters.

This is t for which D(t) = 26.7. So

[tex]D(t) = 30(0.98)^t[/tex]

[tex]26.7 = 30(0.98)^t[/tex]

[tex](0.98)^t = \frac{26.7}{30}[/tex]

[tex]\log{(0.98)^t} = \log{\frac{26.7}{30}}[/tex]

[tex]t\log{(0.98)} = \log{\frac{26.7}{30}}[/tex]

[tex]t = \frac{\log{\frac{26.7}{30}}}{\log{0.98}}[/tex]

[tex]t = 5.77[/tex]

It will take 5.77 years for the depth of the lake to reach 26.7 meters.

Answer:

for plato users exponential decay, 0.02, 0.98, and between 5 and 6 years from top to bottom

Step-by-step explanation:

Answer:

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Answer:

x  =  − 4

Step-by-step explanation:

Answer:

x = -4

Step-by-step explanation:

First, add 7 to both sides:

7x - 7=  12x + 13

7x = 12x + 20

Subtract 12x from both sides:

-5x = 20

Divide each side by -5:

x = -4

So, the answer is x = -4

Answer:

a₂ = G(m₁ + m₂)/(R - √[G(m₁ + m₂)/a₁])²

Step-by-step explanation:

Since the gravitation force of attraction of the center of mass on m₁ equals the centripetal force, then

G(m₁ + m₂)m₁/R₁ = m₁a₁ where (m₁ + m₂) = total mass of the system and R₁ = distance of m₁ from the center of mass

So, G(m₁ + m₂)m₁/R₁² = m₁a₁

G(m₁ + m₂)m₁/m₁a₁ = R₁²

R₁² = G(m₁ + m₂)/a₁

R₁ = √[G(m₁ + m₂)/a₁]

The distance of m₂ from the center of mass is thus R₂ = R - R₁ = R - √[G(m₁ + m₂)/a₁] where R is the distance between the two stars.

Also,  the gravitation force of attraction of the center of mass on m₂ equals the centripetal force, then

G(m₁ + m₂)m₂/R₂ = m₂a₂ where (m₁ + m₂) = total mass of the system and R₂ = distance of m₂ from the center of mass

So, G(m₁ + m₂)m₂/R₂² = m₂a₂

G(m₁ + m₂)m₂/m₂R₂² = a₂

a₂ = G(m₁ + m₂)/R₂²

Substituting R₂ into the equation, we have

a₂ = G(m₁ + m₂)/(R - √[G(m₁ + m₂)/a₁])²

Answer:

2 3/4

Step-by-step explanation:

Answer:

k ≈ - 0.069

Step-by-step explanation:

Given

A = 800 [tex]e^{kt}[/tex]

Substitute A = 400 and t = 10 into the equation

400 = 800 [tex]e^{10k}[/tex] ( divide both sides by 800 )

0.5 = [tex]e^{10k}[/tex] ( take the ln of both sides )

ln [tex]e^{10k}[/tex] = ln0.5

10k lne = ln0.5 [ lne = 1 ]

10k = ln 0.5 ( divide both sides by 10 )

k = [tex]\frac{ln0.5}{10}[/tex] ≈ 0.069 ( to the nearest thousandth )

Answer:

Step-by-step explanation:

400 = 800 * e^(k*t)

What are the units of t? I'm taking it as years.

Divide by 800

400/800 = e^(k*10)

1/2 = e^(k*10)

ln(1/2) = ln(e)^(k*10)

ln(1/2) = k*10 * ln(e)

ln(e) = 1

-0.69314 = k*10

-0.069314 = k

Check

A = 800 e^(-0.069314*10)

A = 800 e^(-0.69314)

A = 800 * 0.50000359

A = 400.0028722

Which is close enough to 400

Answer:

Option B

Step-by-step explanation:

By the property of reflection,

If a function [tex]'f'[/tex] is reflected across [tex]x[/tex]-axis, new function [tex]'g'[/tex] will be defined by,

[tex]g(x)=-f(x)[/tex]

Therefore, equation of the function will be,

[tex]g(x)=-(3)^x[/tex]

Option B will be the correct option.

Answer:

Step-by-step explanation: