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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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seropon [69]

Answer:

answer is gamma mart

Step-by-step explanation:

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3 years ago
1/5(x + 0.5) + 5.24 = 3/2x + 7/10(x + 2.2)<br> Solve for x
luda_lava [24]

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6 0
3 years ago
Compare the fractions using - 4/9 and -8/20
laiz [17]

Answer:

-2/45

Step-by-step explanation:

-4/9 is simplified and both 4 and 9 are perfect squares.

-8/20 can be reduced to -2/5 since both 8 and 20 are divisible by 4.

The difference between them is given by -4/9 - (-2/5) = (18-20)/45 = -2/45.

8 0
2 years ago
6 x 10^-2 is how many times a large as 2 x 10^-8?
Diano4ka-milaya [45]

Answer:

the number 6\,\,\,10^{-2} is three million times larger than 2\,\,\,10^{-8}

Step-by-step explanation:

To answer this, just do the quotient of the first one over the second one, and use the rules for quotient of exponential expressions of the same base:

\frac{6\,\,\,10^{-2}}{2\,\,\,10^{-8}} =\frac{6}{2} \,\frac{10^{-2}}{10^{-8}} =3\,\,\,10^{-2+8}=3\,\,\,10^6=3000000

So the answer is: the number 6\,\,\,10^{-2} is three million times larger than 2\,\,\,10^{-8}

3 0
3 years ago
Read 2 more answers
The length of a rectangle is 9 less than 4 less than the width. The perimeter is 143. Find the width and length.
damaskus [11]

The formula for perimeter is 2l+2w. Since we know l=(w-4)-9, we can substitute this into the formula.

l=w-13

2(w-13)+2w=143

2w-26+2w=143

4w=169

w=42.25 units

Hope this helps!

6 0
3 years ago
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