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3 years ago

Can someone please help me asap I’ll mark brainlist + extra points!!!

Mathematics

1 answer:

lana [24]3 years ago

7 0

Step-by-step explanation:

2) radius = 7

diameter = 14

A = 49π or 153.94

C = 14π = 43.98

3. radius = 9

diameter = 18

area = 81π or254.47

C = 18π = 56.55

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Here are 5 lines on a coordinate grid: Write equations for lines a,b,c,d, and e.

densk [106]

Answer:

A.: x=-4

b.:x=4

c.:y=4

d.:y=-2

e.:y= -3/4x + 1

Step-by-step explanation:

I like these kind of problems and I am great at them! Ask me these anytime you need!

5 0

3 years ago

The formula A = 23.1 e 0.01521 models the population of a US state, A, in millions, t years after 2000.

Art [367]

Answer:

- The population in 2001 is 23.1 million

- It will reach 28.3 million in 2013

Step-by-step explanation:

Given

$A =23.1e^{0.0152t}$

Solving (a): Population in 2000.

This implies that

$t = 2000 - 2000$

$t = 0$

So, we have:

$A =23.1e^{0.0152t}$

$A =23.1e^{0.0152*0}$

$A =23.1e^{0}$

Solve the exponent

$A =23.1*1$

$A =23.1$

The population in 2001 is 23.1 million

Solving (b): When will it reach 28.3 million

This implies that:

$A =28.3$

So, we have:

$A =23.1e^{0.0152t}$

$28.3 = 23.1e^{0.0152t}$

Divide both sides by 23.1

$1.225 = e^{0.0152t}$

Take natural logarithm of both sides

$ln\ 1.225 = ln(e^{0.0152t})$

Rewrite as:

$ln\ 1.225 = 0.0152t\ ln(e)$

$ln(e) = 1$

So:

$ln\ 1.225 = 0.0152t*1$

$ln\ 1.225 = 0.0152t$

Make t the subject

$t = \frac{ln\ 1.225}{0.0152}$

$t = \frac{0.2029}{0.0152}$

$t \approx 13$

Add the value of t to 2013 to get the actual year

$Year = 2000 +13$

$Year = 2013$

It will reach 28.3 million in 2013

6 0

3 years ago

0.00000000213 in scientific notation

Pachacha [2.7K]

Hello!
2.13 x 10^−9
You want to make sure the number(after you move the decimal places) should be in between 1-10.
2.13 is in between 1-10.
I hope this helps;)

4 0

3 years ago

What is the parent function of this equation? ln (x-3) + 4 = f(x)

MakcuM [25]

The parent function is the first step you have to do before graphing the equation...
with that being said...
Parent function:
(In x)
...
additional information:
after the parent function you then could go on to the next step which is move the graph 3 units to the right...
In(x-3)
and then 4 units up...
In (x-3) + 4

(hoped i helped out pick me as the brainliest)

7 0

4 years ago

What is the length of PR?

Rashid [163]

the larger triangle has angles of 75° and 55°.

the smaller triangle has angles of 75° and 55°.

the triangles are similar by AA.

$\bf \cfrac{smaller}{larger}\qquad \qquad \cfrac{PR}{AC}=\cfrac{PQ}{AB}\implies \cfrac{x}{24}=\cfrac{5}{20}\implies \cfrac{x}{24}=\cfrac{1}{4} \\\\\\ x=\cfrac{24}{4}\implies x=6$

6 0

3 years ago

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