30= 20% of ?
30= 20/100 (x)
30= .2 (x)
x=150
150 kids are at the shcool
You might miss out on things you would want to buy .
Step-by-step explanation:
Exponential Functions:
y=ab^x
y=ab
x
a=\text{starting value = }1600
a=starting value = 1600
r=\text{rate = }5.25\% = 0.0525
r=rate = 5.25%=0.0525
\text{Exponential Growth:}
Exponential Growth:
b=1+r=1+0.0525=1.0525
b=1+r=1+0.0525=1.0525
\text{Write Exponential Function:}
Write Exponential Function:
y=1600(1.0525)^x
y=1600(1.0525)
x
Put it all together
\text{Plug in time for x:}
Plug in time for x:
y=1600(1.0525)^{25}
y=1600(1.0525)
25
y= 5750.0628984
y=5750.0628984
Evaluate
y\approx 5750.06
y≈5750.06
Answer: length of rectangular parking lot = 24 yards
Width of rectangular parking lot = 20 yards.
Step-by-step explanation:
Let L represent the length of the rectangular parking lot.
Let W represent the width of the rectangular parking lot.
The rectangular parking lot has a length that is 4 yards greater than the width. It means that
W = L - 4
The formula for determining the area of a rectangle is expressed as
Area = LW
The area of the parking lot is 480 square yards.. It means that
LW = 480- - - - - - - - - - 1
Substituting W = L - 4 into equation 1, it becomes
L(L - 4) = 480
L² - 4L = 480
L² - 4L - 480 = 0
L² + 20L - 24L - 480 = 0
L(L + 20) - 24(L + 20) = 0
L - 24 = 0 or L + 20 = 0
L = 24 or L = - 20
Since the length cannot be negative, then L = 24
W = L - 4 = 24 - 4
W = 20
