Answer: a<13
Step-by-step explanation:
a*(a+1)<a^2+13
a^2+a<a^2+13
subtract a^2 from both sides:
a<13
<span>half-life means you divide by 2
21.6 / 3.6 = 6 hf (hf = half-life)
then you divide by 2^6
6.02 x 10^23 / 2^6 = 9.40625 x 10^21 atoms
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26
3hf ===> 2^3
10.0 / 2^3 = 1.25 gram (remaining)
answer : 10 - 1.25 = 8.75g
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27
128 / 2^n = 2
64 = 2^n
n = 6
24 /6 = 4
4 days is the half-live of the sample
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28
2.5/4.46 of 50% initial mass
(2.5/4.46) x 0.5 x 2 = 0.5605 g
answer: 2 - 0.5605 = 1.4395 g
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29
2^7 = 128
so 7 half-lifes
7* 8040 = 56200 days
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30
the time of 10 half-lifes
= 10 x 0.334s = 3.34s </span><span>
</span>
Answer:
If sine theta = .3090 then arc sine theta =
18 degrees
Then we look up csc 18 degrees which = 3.2361
Step-by-step explanation:
Answer: C. 65
Step-by-step explanation:
Concept:
Here, we need to know the concept of an isosceles triangle.
An isosceles triangle is a triangle that has any two of its sides equal to each other. The corresponding angles of the equal sides are also equal.
If you are still confused, you may refer to the attachment below for a graphical explanation.
Solve:
Let x be m∠EGF
2x + 50 = 180 ⇒ Write the equation
2x + 50 - 50 = 180 - 50 ⇒ Subtract 50 on both sides
2x = 130 ⇒ Simplify
2x / 2 = 130 / 2 ⇒ Divide 2 on both sides
x = 65 ⇒ Simplify
Hope this helps!! :)
Please let me know if you have any questions
