The area of a right triangle is 270 square meters. The height of the right triangle is 15 meters. What is the length of the hypo
2 answers:
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<u>True statements are:</u>
- It has a directrix of x = - 4.
- It has a focus at (4, 0).
<u>Step-by-step explanation:</u>
We have the following statements to check on whether it's right or wrong:
<u>1. It has a directrix of x = -4:</u>
According to figure , parabola directrix is at -4 i.e. at x = -4 , Therefore this statement is true!
<u>2. It opens to the left:</u>
In figure, Parabola opens to right not left , Therefore this statement is wrong!
<u>3. It has a vertex at the origin:</u>
Vertex of Parabola is at what points not shown in figure. Therefore this statement cannot be confirmed as true.
<u>4. The axis of symmetry is the y-axis:</u>
Axis of symmetry for above parabola is x-axis as it cuts parabola into two equal halves , y-axis doesn't do this ! Therefore this statement is wrong!
<u>5. It has a focus at (4, 0):</u>
Parabola focus is at on x-axis . And so, Therefore this statement is true!
Answer:
Step-by-step explanation:
Given that,
The bacterial increase a factor of 31 every day ,
Day 0 = 1 bacterium = 31^0
Day 1 = 31 bacterial = 31¹
Day 2 = 31× 31 bacterial = 31²
Day 3 = 31 × 31 × 31 bacterial = 31³
And so on,
Then, nth day will have
Day n = 31ⁿ bacterial
So, when will the bacterial be 1,000,000,000
Then,
31ⁿ = 1,000,000,000
Take the Natural logarithmic to base 31 of both sides
Log_31 (31)ⁿ = Log_31 (1,000,000,000)
n•Log_31 (31) = Log_31 (1,000,000,000)
Then, log_a (a) = 1
n = Log_31 (1,000,000,000)
Check attachment for better view
Then,
The correct answer is A
The best way I can explain the graph is:
1. look at the line and mark a point where ever you see the line goes through a point (look at picture bellow)
2. best example on your graph is (40, 20): April 40...March 20
3. you will notice that march will always sell half the number of april's sale
another example in your graph:
april sold 10....the line seem to be a 10, 5.....march sold 5
1. look at the line and mark a point where ever you see the line goes through a point (look at picture bellow)
2. best example on your graph is (40, 20): April 40...March 20
3. you will notice that march will always sell half the number of april's sale
another example in your graph:
april sold 10....the line seem to be a 10, 5.....march sold 5