9514 1404 393
Answer:
(b) 60°
Step-by-step explanation:
The sum of angles in a pentagon is 540°, so you have ...
90° +90° +150° +x +150° = 540°
x = 540° -480°
x = 60°
I think that if you use 2 and 3 I think you have to mutually understand the difference between 3 and 2
Answer:
1. <
2. 23/24
3. 487 3/4
4. 29,725
5. Add 2 Add 4
15 17 19
16 19 23
17 21 27
18 23 31
19 25 35
20 27 39
Step-by-step explanation:
1. 11,437 is less than 11,473. 3, the tens place, is less than 7
2. Find the LCD of 5/8 and 1/3. It is 24, 5/8 * 3/3 = 15/24, 1/3 * 8/8 = 8/24
15/24 + 8/24 = 23/24
3. Divide 3902 by 8, 3902/8 = 487.75, As a mixed number, that is 487 3/4
4. 725 * 41 = 29,725
5. Add 2 to 17, 19, 21, 23, and 25. Add 4 to 19, 23, 27, 31, 35, and 39
6. Put each point on the graph, the horizontal line is first, and the vertical line is second:
Horizontal: Vertical:
17 and 19
19 and 23
21 and 27
23 and 31
25 and 35
27 and 39
Step-by-step explanation:
(2c+c) + 12 =78
3c + 12 = 78
78 - 12 = 66
66 ÷ 3 = 22
22 + 22 + 22 + 12 = 78
{ C = 22 }
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>
