3 years ago

What is the answer to the question?

Mathematics

2 answers:

IrinaVladis [17]3 years ago

3 0

Answer:

the answer is option 4th

Gemiola [76]3 years ago

3 0

The answer is 4 because yes the question is 4

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Write the domain of the function using interval notation

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(-♾, 5) (5, ♾)

Step-by-step explanation:

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If there's a 9% tax, and the couch is $227.49 what will the total be?

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Step-by-step explanation:

227.49 x 1.09 = 247.96

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Renae likes to make pizza dough on the weekends. She has 8 1/3 cups of flour. She needs 5/6 of a cup for each pizza.How many piz

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She can make 10 pizzas.

Step-by-step explanation:

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3 years ago

The length of a rectangle is increasing at a rate of 9 cm/s and its width is increasing at a rate of 7 cm/s. When the length is

Hunter-Best [27]

Answer:

<em>129 </em> $cm^2/s$

Step-by-step explanation:

Increasing rate of length, $\frac{dl}{dt}$ = 9 cm/s

Increasing rate of width, $\frac{dw}{dt}$ = 7 cm/s

Length, l = 12 cm

Width, w = 5 cm

To find:

Rate of increase of area of rectangle at above given points.

Solution:

Formula for area of a rectangle is given as:

$Area = Length \times Width$

$A = l \times w$

Differentiating w.r.to t:

$\dfrac{d}{dt}A = \dfrac{d}{dt}(l \times w)\\\Rightarrow \dfrac{d}{dt}A = w \times \dfrac{d}{dt}l +l \times \dfrac{d}{dt}w$

Putting the values:

$\Rightarrow \dfrac{dA}{dt} = 5 \times 9 + 12 \times 7\\\Rightarrow \dfrac{dA}{dt} = 45 + 84\\\Rightarrow \bold{\dfrac{dA}{dt} = 129\ cm^2/sec}$

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3 years ago