Answer:
Check your question
Step-by-step explanation:
Probably wrong
Answer:
7. $8123.79
8. 0.012 g
Step-by-step explanation:
It often pays to follow directions. The attachment shows the use of a TI-84 graphing calculator to find the answers.
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You will notice that the answer to problem 8 does not agree with any of the offered choices. The time period of 22.8 years is 12 times the half-life of the substance, so there will be (1/2)^12 = 1/4096 of the original amount remaining. The time periods corresponding to the amounts shown range from 1.37 years to 16.4 years.
For half-life problems, I find it convenient to use the decay factor (0.5^(1/half-life)) directly, rather than convert it to e^-k. If you do convert it to the form ...
e^(-kt)
the value of k is (ln(2)/half-life), about 0.3648143056.
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For multiple choice problems where the choices make no sense, I like to suggest you ask your teacher to show you how to work the problem. (Alternatively, use the "Report this question" or "Ask a tutor" button sometimes provided.)
-8x + 4 > 5 - 3x
Adding 3x to both sides,
-5x + 4 > 5
Subtracting by -4 on both sides,
-5x > 1
Dividing both sides by -5,
x < - 1/5
First, we determine the area of the floor by multiplying the dimensions given.
Area = Length x Width
Area = (22 ft)(16 ft)
Area is equal 352 m². Then, multiply the calculated area by the surface amount.
Total amount = (352 m²)($32)
= 11,264
Thus, the answer is letter B.
Answer:
11.5 m/s
Step-by-step explanation: