PLEASE HELP ME!!!!!!!! A: 30 B:16 C:20 D:18
2 answers:
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Answer:
Time= years
Step-by-step explanation:
Let total time
Initial Amount
Final Amount
Total interest = Final Amount - Initial Amount
Simple Interest
Answer:
See Below.
Step-by-step explanation:
We have the function:
Depending on the behavior of the coefficient, many things can happen. The parent exponential function has a=1. If a is something other than 1, however, there are three main changes.
Let’s use b=2 to illustrated the examples.
(In the graphed examples, below, the parent function (with b=2) is the red curve.)
- If <em>a</em> is a positive, rational number greater than 1.
If a is a positive number other than 1, say 2, then this represents a vertical stretch.
In other words, our function is stretched closer to the y-axis.
(This is the blue curve. It is closer to the y-axis than the parent function (red curve).)
- If <em>a</em> is a positive, rational number greater than 0 but less than 1.
If a is a number between 0 and 1 (so a fraction), say, 1/2, then this represents vertical compression.
In other words, our function gets farther away from the y-axis.
(This is the black curve.)
- If <em>a </em>is a negative.
If a is <em>negative</em>, then this means that the graph was flipped over the x-axis.
(This is the green curve.)
Note that if we have something such as a=-2 or a=-1/2, this means that the function we flipped over the x-axis first and <em>then</em> vertically stretched or compressed.
(And example of this is illustrated with the orange curve).
Answer: Second option is correct.
Step-by-step explanation:
Since we have given that
Amount of quarts of acid and water = 5
Percentage of acid = 40%
So, Amount of acid is given by
Amount of water is given by
So, we need to find the amount of water must be added to the mixture to get weakened to 30% acid.
Let x amount of water is added to mixture, so that water gets 70% of mixture and acid becomes 30% of mixture.
According to question,
Hence, Second option is correct.