pls help im stuck. i dont understand where to start and what to do

Step-by-step explanation:

We would apply the formula for exponential decay which is expressed as

A = P(1 - r/n)^ nt

Where

A represents the value after t years.

n represents the period for which the decrease in value is calculated

t represents the number of years.

P represents the value population.

r represents rate of decrease.

From the information given,

P = 23000

r = 8% = 8/100 = 0.08

n = 1

Therefore, the exponential decay function described in this situation is

A = 23000(1 - 0.08/n)1)^ 1 × t

A = 23000(0.92)^t

If A = 15000, then

15000 = 23000(0.92)^t

0.92^t = 15000/23000 = 0.6522

Taking log of both sides to base 10

Log 0.92^t = log 0.6522

tlog 0.92 = log 0.6522

- 0.036t = - 0.1856

t = - 0.1856/- 0.036

t = 5 years to the nearest year

Answer:

anything that adds up to twelve like 3 x 4 or 6 x 2 or 12 x 1 so three answers

Answer:

(-8, 7)

Step-by-step explanation:

for 90 degree rotations u switch the numbers and make the first number opposite

Answer:c

Step-by-step explanation:

-8,7

Answer:

1. $0.48

2. $0.52

3. $0.53

Step-by-step explanation:

12/ $25

24/$46

50/$94

hope this helps

Answer:

-15 + 10x

or

10x - 15

(either one works)

Step-by-step explanation:

You mean you just want me to expand it?

Ok.

Multiply -5 by 3 and -2x.

(-5)(3) = -15

(-5)(-2x) = +10x

Add those together:

-15 + 10x

or

10x - 15

Answer:

t = 6 hours

Step-by-step explanation:

Given that,

Average speed, v = 7 km/h

Distance, d = 42 km

We need to find the time taken to complete the course. The average speed is given by :

[tex]v=\dfrac{d}{t}\\\\or\\\\t=\dfrac{d}{v}\\\\t=\dfrac{42\ km}{7\ km/h}\\\\t=6\ h[/tex]

So, the time taken to complete the course is 6 hours.

Answer:

The radius is 15

Step-by-step explanation:

In the equation, 225 is a square of a radius, so the radius itself is the square root of 225, which is 15.

Answer: the radius is 15

Step-by-step explanation:

Answer:

X=1, x= -3, x= -1/2

Step-by-step explanation:

okay, so you've got your zeros right here actually. it's very simple, so I'll give you the reader's digest: SET THEM ALL TO ZERO

x-1=0 add your one, so that's x=1

x+3=0, subtract your 3, so that's x= -3

the last one is tricky: 2x+1=0, 2x= -1, but you can go further. divide your two, and you're left with x= -1/2

I hope this helps!!!

Answer:

625?

Step-by-step explanation:

Answer:

625 is the value of 5×5×5×5 or 5^4

Answer:

C.

Step-by-step explanation:

Answer: A) x axis

Step-by-step explanation:

goes through the origin

Answer:

well yes if the back sticks out or if its turned like a x / it can go inside

Step-by-step explanation:

Step-by-step explanation:

6h + 5(x +h)

6h + 5x + 5h

11h + 5x

Answer:

answer: All real numbers, or No solutions

Step-by-step explanation:

okay, the equation says 4(x+4)=(4x+16)

if we apply 4 to the parenthesis we get 4*(x+4)=4x+16

so basically the equation is telling us 4x+16=4x+16, which gives us all real numbers or No solutions as the answer

Answer:

4x+16=4x+16

Step-by-step explanation:

4(x+4)=(4x+16)

4x+16=4x+16

Answer:

1

Step-by-step explanation:

Answer: Ok so first 0.05(6000 - x) + 0.07x = 372

300 - 0.05x + 0.07x = 372

300 + 0.02x = 372

0.02x = 72

x = 3600

He invested $3600 at 7% and $2400 at 5%.

Step-by-step explanation:

Answer:

Step-by-step explanation:

I think you had a typo where interest should be 460 not 46 because even if the whole 6000 were invested at 7% he would have earned $420 in interest. Also if total investment was switched from 6000 to 600 the 46 in interest would work.

.07x+.08(6000-x)=460

.07x-.08x+480=460

-.01x+480=460

-.01x=-20

x=$2000

which is easy enough to check

2000(.07)+4000(.08)=$460

Answer:

the third y

Step-by-step explanation:

Answer:

7%

Step-by-step explanation:

Given data

Principal=  $3600

Time= 2 years

SImple interest=  $504

The expression for the simple interest is given as

SI= PRT/100

We want to find the rate R

504= 3600*R*2/100

cross multiply'

504*100= 3600*R*2

50400= 7200R

divide both sides by 7200

R= 50400/7200

R= 7%

Hence the rate is at 7%

Answer:

s²+r²=t² => r²=s²-t²= 27²-25²

The answer is D

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

'r' and 's' are legs and 't' is the hypotenuse

The Pythagorean Theorem takes the sum of the legs, squared, and sets them equal to the hypotenuse squared.

So in this problem we could start with:

r² + 25² = 27²

r² = 27² - 25²

to get 'r' by itself we take its square root, and what we do to one side of an equation we must also do to the other side, so:

r = [tex]\sqrt{27^2 - 25^2 }[/tex]

Given:

A figure.

To find:

The classification for angle 1 and angle 7.

Solution:

From the given figure, it is clear that a transversal line intersect two parallel lines and forms 8 angles, 4 angles on each intersection.

In the figure, angle 1 and angle 7 are on opposite sides of the transversal line and outer side of each of those two parallel lines.

Therefore, angle 1 and angle 7 are alternate exterior angles.

Step-by-step explanation:

[tex] \frac{6}{2} = \frac{3}{1 } = \frac{12}{4} = \frac{15}{5} \\ [/tex]

Answer:

$24/5 weeks = $4.80 saved per week.

$4.80 is 30% of what number?.....

4.8=0.3*X....... 4.8/0.3=X ........X=16

So, Joseph receives $16 per week.

Step-by-step explanation:

Answer:

A,B,C, and E

Step-by-step explanation:

Answer:

her equation should be a² + 3² = 4²

Step-by-step explanation:

a² + 3² = 4²

a² + 9 = 16

a² = 7

a = [tex]\sqrt{7}[/tex]

a ≈ 2.6 inches

Look I tried ok???? Sorry... =_=