Answer:
$17.28 Amalie paid for the shirt.
Step-by-step explanation:
Amalie makes a profit of 20%, She sells a shirt for $21.60.
Here,
21.6 × 20/100 = $4.32
Now,
$21.60 - $4.32 = $17.28
Thus, $17.28 Amalie paid for the shirt.
<u>-TheUnknownScientist</u><u> 72</u>
Answer:
The correct option is 2. The circle has a radius equal to 7.
Step-by-step explanation:
It is given that center of a circle is at the origin on a coordinate grid.
The standard form of the circle is
Where (h,k) is center of the circle and r is radius.
The equation of the circle is
The line intersects the circle at (0,7) it means the point lies on the circle.
Put x=0 and y=7 in the above equation.
Therefore the radius of the circle is 7 units.
The line is passing through the point (0,7) with positive slope. Two points are required to find the slope of a line.
Since we have a single point therefore we cannot find the slope of the line. Second option is correct.
Answer:
Step-by-step explanation:
we know that
The equation of a exponential decay function is equal to
where
r is the number of bacteria remaining
n is the number of hours since the antibiotic was applied
a is the initial value
r is the rate of change
we have
substitute