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3 years ago

Help please!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

krok68 [10]3 years ago

5 0

C. 0.25 because you divide 0.06 by 0.24

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The diagram shows a circle of radius 1 contained in a square. If the area of the circle equals x% of the area of the square, the

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Answer:

Area of square with a side of 2r = 2(1) = 2 = 2^2 = 4

Area of circle = pi ( 1)^2 = pi

x = pi / 4 ≈ .79 = 79%

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3 years ago

A road perpendicular to a highway leads to a farmhouse located d miles away. An automobile traveling on this highway passes thro

pshichka [43]

Answer:

$\frac{dh}{dt}=\frac{30r}{\sqrt{d^{2}+900}}$

Step-by-step explanation:

A road is perpendicular to a highway leading to a farmhouse d miles away.

An automobile passes through the point of intersection with a constant speed $\frac{dx}{dt}$ = r mph

Let x be the distance of automobile from the point of intersection and distance between the automobile and farmhouse is 'h' miles.

Then by Pythagoras theorem,

h² = d² + x²

By taking derivative on both the sides of the equation,

$(2h)\frac{dh}{dt}=(2x)\frac{dx}{dt}$

$(h)\frac{dh}{dt}=(x)\frac{dx}{dt}$

$(h)\frac{dh}{dt}=rx$

$\frac{dh}{dt}=\frac{rx}{h}$

When automobile is 30 miles past the intersection,

For x = 30

$\frac{dh}{dt}=\frac{30r}{h}$

Since $h=\sqrt{d^{2}+(30)^{2}}$

Therefore,

$\frac{dh}{dt}=\frac{30r}{\sqrt{d^{2}+(30)^{2}}}$

$\frac{dh}{dt}=\frac{30r}{\sqrt{d^{2}+900}}$

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3 years ago

A store pays $72 for a crystal vase. The store marks up the price by 50%. What is the amount of the mark-up?

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Answer:

$36.00 markup

Step-by-step explanation:

$72 x 50% (0.50) = $36.00

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3 years ago

25 degrees decreased by 60%

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Answer:

25 degrees decreased by 60% is 10

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3 years ago

If m^1=m^2 then m^ 1 is?

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Answer:

Step-by-step explanation:

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