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2 years ago

A store buys a remote control robot for $60. They mark it up by 30%. What will be the selling price

Mathematics

1 answer:

exis [7]2 years ago

7 0

The answer would be 78 because 10% of 60 is 6. 6 x 3 = 18 60+18=78

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Find the area of a circle if the circle is 5 m long

SpyIntel [72]

Answer:

A≈78.54

Step-by-step explanation:

A=πr2

I think this is right

6 0

3 years ago

Hello i need help with question 5 asap!!

sergeinik [125]

Answer:

arc DB length = 14π feet

Step-by-step explanation:

Assuming point A is the center of the circle, arc DC has measure 180°. Arc DB has measure 40° less, so is 140°. Since you want this in terms of π, we need to convert the degree measure to radians. We do that by multiplying by (π/180) radians per degree:

arc DB = 140° = 140°(π/180°) radians

Now that we know the arc measure in radians, we can find the length of the arc. It is given by the formula ...

s = rθ

where r represents the radius and θ is the measure of the arc in radians.

The arc length is ...

s = (18 ft)(7π/9) = 14π ft

Arc DB has a length of 14π feet.

4 0

3 years ago

How does brainstorm,decide,work,enjoy help with motivation?

Assoli18 [71]

Answer:

It helps because it gets you thinking. Personally, it would motivate me because that process itself is very helpful. Brainstorm will get you your idea, you can decide if you want to do it or not, then you work on it, and because you have the right attitude towards whatever you are working on, you'll enjoy it!

6 0

3 years ago

What times 5 equals 62?

Anni [7]

12.4 because 62 divided by 5 = 12.4

5 0

3 years ago

Read 2 more answers

4 The ratio of corresponding dimensions of two similar solids is 3/4. The surface

White raven [17]

4.

The ratio is 3/4 for corresponding dimensions, the ratio of their surface areas is equal to the square of this ratio:

$\sf (\dfrac{3}{4})^2=\dfrac{S}{96}$

Simplify the exponent:

$\sf \dfrac{9}{16}=\dfrac{96}{S}$

Cross multiply:

$\sf 9S=1536$

Divide 9 to both sides:

$\sf S\approx 170.7~m^2$

So the surface area of the second solid is 54 square meters.

The ratio is 3/4 for corresponding dimensions, the ratio of their volumes is equal to the cube of this ratio:

$\sf (\dfrac{3}{4})^3=\dfrac{720}{V}$

Simplify the exponent:

$\sf \dfrac{27}{64}=\dfrac{720}{V}$

Cross multiply:

$\sf 27V=46080$

Divide 64 to both sides:

$\sf V\approx 1706.7~m^3$

5.

A globe is a sphere, use the formula for the volume of a sphere:

$\sf V=\dfrac{4}{3}\pi r^3$

The radius is half of the diameter, so the radius here is 40/2 = 20. Plug it in the formula, use 3.14 to approximate for Pi:

$\sf V=\dfrac{4}{3}(3.14)(20)^3$

Simplify the exponent:

$\sf V=\dfrac{4}{3}(3.14)(8000)$

Multiply:

$\sf V\approx \boxed{\sf 33,493~in^3}$

6 0

3 years ago

Read 2 more answers