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Bogdan [553]
2 years ago
14

I WILL MARK AS BRAINLIEST! Simplify

Mathematics
2 answers:
Stolb23 [73]2 years ago
6 0
A.) -98
b.) -12
c.) -105
d.) -46
I promise I did not copy.
nevsk [136]2 years ago
5 0

Answer:

a) -98

b) -12

c) -105

d) -46

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Krypton-91 is a radioactive substance that decays very quickly. The function Q(t)=Qoe^-kt models radioactive decay of krypton-91
Masteriza [31]
The "k" value should have units and should be negative.
k = -.07 / seconds
Half-Life = ln (.5) / k
Half-Life = ln (.5) / -.07
Half-Life = -.693147 / -.07
Half-Life = 9.9 seconds
(actually, wkpedia says half-life of Krypton 91 is 8.57 seconds)

elapsed time = half-life * log (bgng amt / end amt) / log (2)
elapsed time = 9.9 * log (100 / 10) / 0.30102999566
elapsed time = 9.9 * 1 / 0.30102999566
<span><span>elapsed time = 9.9 * 3.3219280949 </span>
</span><span><span><span>elapsed time = 32.8870881395 </span> </span> </span>
<span>elapsed time = 32.89 seconds (rounded)

Source:
http://www.1728.org/halflife.htm

</span>
6 0
3 years ago
Read 2 more answers
Three friends decided to exercise together four times a week to lose fatand increase muscle mass. While all three were healthier
gregori [183]

Answer:

6 pounds lost

Step-by-step explanation:

5+4 is 9 9-3 is 6 which means that in total, 6 pounds was lost

5 0
2 years ago
Jeff is purchasing a car for $29,175 that will depreciate in value 7.5% each year.
beks73 [17]

Answer:

Step-by-step explanation:

figure that S*** out your self jeez

5 0
3 years ago
Copy the problem, mark the givens in the diagram. Given: CS ≅ HR, ∠CHS ≅ ∠HCR, ∠CSH ≅ ∠HRC, Prove: CR ≅ HS
Veseljchak [2.6K]

Explanation:

1. CS ≅ HR, ∠CHS ≅ ∠HCR, ∠CSH ≅ ∠HRC — given

2. ∆CRH ~ ∆HSC — AA similarity theorem

3. ∠SCH ≅ ∠RHC — corresponding angles of similar triangles are congruent

4. CH ≅ HC — reflexive property of congruence

5. ∆CRH ≅ ∆HSC — SAS congruence theorem

6. CR ≅ HS — CPCTC

6 0
3 years ago
The ratio is boys to girls is 3:5. If there are 24 boys how many girls are in the class
RoseWind [281]
If the ratio is 3:5, then for every 3 boys there are 5 girls, so you multiply 3 and 5 by 24 and you get your answer.
4 0
3 years ago
Read 2 more answers
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