Answer:
Step-by-step explanation:
We have been told that the ratios are inversely proportional in our given problem. We are asked to find the missing value.
We know that two inversely proportional quantities are in form , where, y is inversely proportional to x and k is the constant of proportionality.
Let us find constant of proportionality using and in above equation.
Now, we will use and in our equation to find as:
Therefore, the value of is 9.
Answer: c. $9.00
Step-by-step explanation:
45 x .20 = 9.00
Answer: t + 20 = 60; 40 minutes are spent answering phone calls.
Step-by-step explanation: We know that 20 minutes are spent out of a 60 minute day of volunteer work. So, with the equation, t + 20 = 60, we can solve to find out that 40 minutes are spent answering phone calls.
Answer:
<h2>
12(cos120°+isin120°)</h2>
Step-by-step explanation:
The rectangular form of a complex number is expressed as z = x+iy
where the modulus |r| = and the argument
In polar form, x =
Given the complex number, . To express in trigonometric form, we need to get the modulus and argument of the complex number.
For the argument;
Since tan is negative in the 2nd and 4th quadrant, in the 2nd quadrant,
z = 12(cos120°+isin120°)
This gives the required expression.