3 years ago

Glenn Andrews recently bought a new motorbike for $3,950. If he had to pay 6 percent sales tax on the

Mathematics

1 answer:

GalinKa [24]3 years ago

4 0

The total amount of money he had to pay for the bike is $3,954.02 because 6 percent of 7 is 4.2

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What is the radius of a sphere if its surface area is 2,122.64 square inches? (Use 3.14 for π.) 11 in. 13 in. 121 in. 169 in.

crimeas [40]

To solve this, we are going to use the surface are of a sphere formula: $A=4 \pi r^2$
where
$A$ is the surface area of the sphere
$r$ is the radius of the sphere

We know for our problem that $A=2122.64$ and $\pi =3.14$ , so lets replace those vales in our formula:
$A=4 \pi r^2$
$2122.64=4(3.14)r^2$
$2122.64=12.56r^2$
Now, we just need to solve our equation for $r$ :
$\frac{2122.64}{12.56} =r^2$
$r^2=\frac{2122.64}{12.56}$
$r^2=169$
$r=+or- \sqrt{169}$
$r=13$ or $r=13$
Since the radius of a sphere cannot be a negative number, $r=13$ .

We can conclude that the radius of a sphere with surface area 2,122.64 $in^2$ is 13 in.

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3 years ago

Briana spent 2 3/4 hours on her science project. Jackson worked 1 1/3 times as long on his science project as Briana worked. For

nikdorinn [45]

3 2/3 hours. Because if you do 2 3/4 times 1 1/3 you get 11/3 which simplifies into a mixed fraction of 3 2/3.

8 0

3 years ago

Examine the system of equations below. Which choice will not result in an equation that would also belong to this

zaharov [31]

I would say that it is either B. Multiply the second equation by 4. Then add that result to the first equation or D. Add the two equations together

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3 years ago

PLEASE HELP!! Find the surface area of each figure to the nearest tenth. Show your work.

hram777 [196]

Surface area = 2(ab+bc+ac)
a=5.2 ft, b=2.4 ft, c=3.5ft

Surface area = 2(5.2 * 2.4 + 2.4 * 3.5 + 3.5 * 5.2) =
2(12.48 + 8.4 + 18.2) =
2 * 39.08 =
78.16 ≈ 78.2 ft² ← to the nearest tenth

7 0

3 years ago

Whats 3480+ 92719384

nikitadnepr [17]

92722864

Hope this helps ya

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3 years ago

Read 2 more answers