This is a nice "rates of change" problem from Calculus.
Let the length and width of the rect. be L and W. We are given the following info:
dL/dt = 6 cm/s; dW/dt = 4 cm/s; L = 11 cm and W = 5 cm.
The area of the rect. is A = L*W. Differentiating,
dA/dt = L(dW/dt) + W(dL/dt).
Subst. the given info: dA/dt = (11 cm)(4 cm/sec) + (5 cm)(6 cm/sec).
Just evaluate this to find dA/dt: (44 + 30) cm^2/sec = 76 cm^2/sec
"Evaluation" mostly means "simplifying an expression down to a single numerical value". Sometimes you will be given a numerical expression, wher all you have to do is simplify; that is more of an order-of-operations kind of question.
Hope this helped BTW can I have brainliest that would help me
The equation is 1.95+30+7.20+2/3(m-1.95-30-7.20)+38.50=m
The amount of money Liza earned is $154.65
<h3>What is Unitary method?</h3>
It is a method where we find the value of a single unit from the value of multiple units and the value of multiple units from the value of a single unit.
let the money she earn be m.
the remaining money = m-1.95-30-7.20
So, her total earning is,
1.95+30+7.20+2/3(m-1.95-30-7.20)+38.50=m
39.15+38.50+2/3(m-39.15)=m
77.65+2m/3-26.10=m
77.65-26.10=m-2m/3
51.55=(3m-2m)/3
51.55*3=m
m=$154.65
Learn more about this concept here:
brainly.com/question/28438183
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Answer:
20 centimeters
Step-by-step explanation:
27 / x = 12
x = 2.25 times
width would be 45 / 2.25 = 20 centimeters
Answer:
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Step-by-step explanation: