a. If , then
.
b. If , then
, so that
.
c. If , then
, so that
.
Approximately how long will it take a 100-gram sample of francium-223 to decay to 20 grams?
1 answer:
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Answer:
a =
x =
Step-by-step explanation:
Let's solve for a.
8x−5x+4−x=ax+8
Step 1: Flip the equation.
ax+8=2x+4
Step 2: Add -8 to both sides.
ax+8+−8=2x+4+−8
ax=2x−4
Step 3: Divide both sides by x.
Let's solve for x.
8x−5x+4−x=ax+8
Step 1: Add -ax to both sides.
2x+4+−ax=ax+8+−ax
−ax+2x+4=8
Step 2: Add -4 to both sides.
−ax+2x+4+−4=8+−4
−ax+2x=4
Step 3: Factor out variable x.
x(−a+2)=4
Step 4: Divide both sides by -a+2.
Hope this helps!
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The given figure can be drawn as,
From the figure,
Since angle of incidence will be equal to angle of reflection, Therefore, the height of cactus is 6 m.
