If the area of a square is 9, then the perimeter of the
square is

Answer:

False

Step-by-step explanation:

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

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:

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:

382

Step-by-step explanation:

Just add all of them and 1 hour equals 60 mins

First, lets add the hours.

1 hour + 1 hour + 1 hour = 3 hours

Now, let's add the minutes,

42 minutes + 32 minutes + 38 minutes + 30 minutes = 142 minutes

1 hour = 60 minutes

How many grouped 60's are there in 142? There are 2 full 60s in 142 minutes.

2 60s = 120 minutes

Add 2 hours, but subtract 120 minutes.

142 minutes - 120 minutes = 22 minutes

So, the final answer is 5 hours and 22 minutes.

If this helps, please mark brainliest!

Have a wonderful day!

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: No

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

Answer:

Step-by-step explanation:

Answer:

biosphere then ecosystem then community populations then organisms

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

Answer:

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Answer:

G)

Step-by-step explanation:

3% of 8000 is 240

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

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:

2048 I think

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

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:

8

Step-by-step explanation:

volume of cube = side lenght ^3

= 2^3

= 8cubic inch.

Answer:

Answer:

Step-by-step explanation:

Ap classroom

Answer:

59,280

Step-by-step explanation:

the answer is base in my previous learning.. hope it helps..

Answer:

60%

Step-by-step explanation:

15/25=.6 = 60%

you say 15 divided by 100 multiplied by 25

Answer:

Step-by-step explanation:

There is 60 min. in 1 hour. 60 ÷ 15 =4. 4×24 = 96

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:

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

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

A graphing calculator does this nicely.

Answer:

i got -380

Step-by-step explanation:

sorry if not helpful