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3 years ago

11

Please help me answer this question. First to answer will be marked braineist. NO WORK NESSACARY. Thank you ☺️

2 answers:

Nutka1998 [239]3 years ago

4 0

i did the work and the answer is f(x) = 3x+3

shusha [124]3 years ago

4 0

Yeah this guy above me is right, I took Algebra 1 Honors so I think I'd know. If someone in the future needs the work, all you really need to do to figure this out is input the x coordinate found in the (x,y) so for example (0, 3) into the equation f(x) = 3x + 3 so...

f(x) = 3 (0) + 3 = f(x) = 3 WHATEVER YOU HAVE LEFT IS THE Y COORDINATE SO YOU KNOW WHEN YOU INPUT X INTO THE EQUATION YOU WILL FIND Y WHICH IS 3 (0, 3).

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A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 32 grams. Rounding to

s2008m [1.1K]

Answer:

Part 1 : $A=250 e^{-0.008223t}$

Part 2 : Half life is 84 minutes ( approx )

Step-by-step explanation:

Part 1 : Suppose the function that shows the amount( in grams ) of the substance after t minutes,

$A=A_0 e^{kt}$

If t = 0 min, A = 250 grams,

$250=A_0 e^{0}$

$\implies A_0 = 250$

If t = 250, A = 32 grams,

$32 = A_0 e^{250k}$

$32 = 250 e^{250k}$

$0.128 = e^{250k}$

Taking ln both sides,

$\ln(0.128) = 250k$

$\implies k =\frac{\ln(0.128)}{250}=-0.008223$

Hence, the equation that shows this situation,

$A=250 e^{-0.008223t}$

Part 2 : If A = 250/2 = 125,

$125 = 250 e^{-0.008223t}$

$0.5 = e^{-0.008223t}$

Taking ln both sides,

$\ln(0.5) = -0.008223t$

$\implies t =\frac{\ln(0.5)}{-0.008223}\approx 84$

Therefore, the half life of the substance would be 84 minutes.

8 0

3 years ago

Help me please thank you!!

Alexxandr [17]

The answer to your problem is A because you must add them altogether but i might be wrong im just trying to help you out

5 0

3 years ago

Can you pls help me i reallly need it

yan [13]

Answer:

D

Step-by-step explanation:

$49 one time payment so it is added.

$25 per month and he pays for a year(12 months) = 12 times 25

$49 + (12 × 25)

4 0

2 years ago

Select the set of measurements that can form a triangle.

Serhud [2]

Answer:

B

Step-by-step explanation:

5 0

3 years ago

I have a question about fractions

yarga [219]

Answer:

please just add the question

5 0

2 years ago

Read 2 more answers