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padilas [110]
3 years ago
10

A radioactive isotope that was originally 275 grams has decayed to 150 grams. the equation shown can be used to calculate the nu

mber of years/T, it took for the decay to occur
150 + 275e ^-0.1386t
what is the approximate number of years it took for the isotope to decay for 275 grams to 150 grams?

A.0.1 years
B.0.4 years
C.1.9 years
D.3.9 years
E.4.4 years
Mathematics
2 answers:
agasfer [191]3 years ago
4 0

Answer: 4.4

Step-by-step explanation:

k0ka [10]3 years ago
3 0

Answer: 4.4 years

Step-by-step explanation:

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a fish tank has a height of 30 inches, length of 20 inches, and a width of w 25 inches. how many cubic inches will the tank hold
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Answer:

Here is your answer!

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6 0
3 years ago
Tyrone opens a savings account by depositing $75 in August. He increases each of the next monthly deposits by $10. Which of the
RSB [31]

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Answer is C

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3 years ago
Write an equation for the line perpendicular to the line y= -2/3+7 which passes through the point (-5,6)
zysi [14]
Y = -2/3x + 7.....the slope here is -2/3. A perpendicular line will have a negative reciprocal slope. All tht means is take the original slope, flip it, and change the sign. So we take -2/3....flip it making it -3/2.....change the sign making it 3/2. So ur perpendicular line will have a slope of 3/2.

y = mx + b
slope(m) = 3/2
(-5,6)....x = -5 and y = 6
now sub and find b, the y int
6 = 3/2(-5) + b
6 = -15/2 + b
6 + 15/2 = b
12/2 + 15/2 = b
27/2 = b
so ur perpendicular equation is : y = 3/2x + 27/2 <==
8 0
3 years ago
Find \tan\left(\frac{17\pi}{12}\right)tan( 12 17π ​ )tangent, left parenthesis, start fraction, 17, pi, divided by, 12, end frac
uranmaximum [27]

One way to do this is to notice

\dfrac{17\pi}{12}=\dfrac\pi6+\dfrac{5\pi}4

Then

\tan\dfrac{17\pi}{12}=\tan\left(\dfrac\pi6+\dfrac{5\pi}4\right)=\dfrac{\tan\frac\pi6+\tan\frac{5\pi}4}{1-\tan\frac\pi6\tan\frac{5\pi}4}

We have

\tan\dfrac\pi6=\dfrac{\sin\frac\pi6}{\cos\frac\pi6}=\dfrac{\frac12}{\frac{\sqrt3}2}=\dfrac1{\sqrt3}

and since \tan x has a period of \pi,

\tan\dfrac{5\pi}4=\tan\left(\pi+\dfrac\pi4\right)=\tan\dfrac\pi4=1

and so

\tan\dfrac{17\pi}{12}=\dfrac{\frac1{\sqrt3}+1}{1-\frac1{\sqrt3}}=\dfrac{1+\sqrt3}{\sqrt3-1}=2+\sqrt3

7 0
3 years ago
PLEASEEEEEE HELP!!<br> LOOK AT THE PICTURE PLS!
Serga [27]
The answer is -6 because the square root of 36 is 6, but then you have to add the negative in front of it.
3 0
3 years ago
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