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Sedbober [7]
3 years ago
14

If there is 360 grams of radioactive material with a half-life of 8 hours, how much of the radioactive material will be left aft

er 32 hours and is the radioactive decay modeled by a linear function or an exponential function?
A) 22.5 grams; linear
B) 22.5 grams; exponential
C) 45 grams; linear
D) 45 grams; exponential
Mathematics
1 answer:
AnnZ [28]3 years ago
7 0
22.5 grams : Exponential

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The amount of money Tom has is 75% of Sallys amount of money. After Sally spent $120 and Tom saved all his money Tom's amount of
egoroff_w [7]

Answer: sally initially has $240, Tom initially has $180.

Step-by-step explanation:

Let initial amount of money sally has = x

Then, initial amount tom has = 75% * x = 0.75x

Now to present,

Amount sally has = x -120

Amount tom has = [x - 120] + [50% * (x-120)]

= x - 120 + 0.5x - 180

= 1.5x - 180

Since Tom didn't spend, it means this is the same amount tom has then we equate both equations.

0.75x = 1.5x - 180

180 = 0.75x

x = 240

Therefore, initial money of sally of sally = $240

Initial money of tom = 240 * 0.75 = $180.

6 0
3 years ago
Analyze the diagram below and complete the instructions that follow.
Alona [7]
A

Durhsvsn its a I try
6 0
3 years ago
|3 - 5 + 7|.<br><br>O 15<br>O 5<br>O -15<br>O -5​
Aliun [14]

Answer:

5

Step-by-step explanation:

The answer is 5

because 3 - 5 = -2

and -2 + 7 = 5

so the answer is 5

4 0
3 years ago
I WILL GIVE BRAINLIEST!!!! Calculate cos M if a= 4, b= 12.5, c= 13.1244 **Round your answer up to four decimal places.
kompoz [17]

Answer:

cosM ≈ 0.3048

Step-by-step explanation:

remember SOH CAH TOA = sine: opposite/hypotenuse; cosine: adjacent/hypotenuse; tangent: opposite/adjacent

cos = CAH

cosM= a / c

cosM = 4.0 / 13.1244

cosM = 0.30477

cosM ≈ 0.3048

7 0
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Solve the systems of equations using the substitution method.<br> 5y-6=x<br> Y=-x
kaheart [24]

Answer:

x=-1, y=1. (-1, 1).

Step-by-step explanation:

5y-6=x

y=-x

-----------

5(-x)-6=x

-5x-6=x

-5x-x=6

-6x=6

x=6/-6

x=-1

y=-(-1)=1

7 0
3 years ago
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