Answer:
12+ (-6) + (-2)
Step-by-step explanation:
Take the amount of money she started with and subtract the purchases
12 - 6 -2
If we want to use addition, add the opposite
12+ (-6) + (-2)
a= initial value, 25000. b = rate of decay, (1-.04) or (.96)
a represents the initial value in exponential functions and b represents the rate of growth or decay. for decay subtract the 4% from 1 or 1-.04.
In order to get -140, one number has to be negative and one number has to be positive. And these two numbers when added together give you a -4, which means the greater of these numbers has to be negative.
Try guess and check strategy by listing possible factor combinations for -140 and see which one works!
The area of the circle is calculated through the equation,
A = πr²
where A is the area and r is the radius. An alternate equation can be used,
A = πD²/4
where D is the diameter.
Substituting the known value to the equation,
A = π(9.1 cm)² / 4
A = 65.03 cm²
The area of the sector, As, is calculated by multiplying the area of the circle by the ratio of the angle to the whole revolution.
As = (65.03 cm²) x (170°/360°)
<em>As = 30.71 cm²</em>
The answer to this question is therefore letter B.
