Round the following number to the indicated place value.
2 answers:
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The A option is correct.
<h2>Ratio and proportion</h2>A ratio is an ordered pair of numbers a and b, written as a/b where b does not equal 0. A proportion is an equation in which two ratios are set equal to each other.
Given
The interest rate applied to the present value has on the monthly payment P in the formula
The effect an increase in i.
<h3>How to find it?</h3>on simplifying the equation, we get
Let n be the constant, then the equation will be
It is clear that V is proportional to i.
An increase in i, the interest rate, will not change P, the monthly payment.
Thus, the A option is correct.
More about the ratio and the proportion link is given below.
Answer:
Step-by-step explanation:
I believe you're actually looking for their respective rates. If A travels directly west and B travels directly north, and the distance between them is 30 miles, what we have is a right triangle situation. The hypotenuse of the triangle is 30. If the distance an object travels at a certain rate for given time is d = rt, then for B, our formula for distance is d = 2r (since the time each traveled is 2 hours). A traveled 3 miles per hour faster, so the formula for distance for A is d = (r + 3)2. Again, each traveled for 2 hours, so t = 2. Distributing we get that d = 2r + 6. Now that we have each expression for A and B, we use them in Pythagorean's Theorem to find the only unknown we have which is r. That's why I said in the beginning that I believe what you're actually looking for is the rate that each traveled. Our equation is:
and
and
Putting everything on one side and setting the quadratic equal to 0 to factor, we get
You can factor out an 8 to make the numbers a bit smaller:
Factor to get
8(r - 9)(r + 12)=0
That means, by the Zero Product Property, that 8 = 0, r - 9 = 0, or r + 12 = 0. We all know that 8 doesn't = 0, so forget that one!! If r - 9 = 0, then r = 9. If r + 12 = 0. then r = -12. We all know that rate cannot be negative (velocity can, but we are not using vector math here), so we discount rate as -12. That means that r = 9. B's rate is 9 then and A's rate is 12. There you go!