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tatuchka [14]
3 years ago
10

Until 2014, the mass of a kilogram was defined as exactly equal to the mass of a special

Mathematics
2 answers:
Elena L [17]3 years ago
5 0

Answer:

7241.25 mm squared

Step-by-step explanation:

The surface area of a cylinder is denoted by: A=2\pi r^2+2\pi rh, where r is the radius and h is the height.

Here, we know that the diameter is 39.2 mm, and since diameter is twice the radius, then r = d/2 = 39.2/2 = 19.6 mm. We also know that the height is 39.2 mm, so plug these values in:

A=2\pi r^2+2\pi rh

A=2\pi (19.6)^2+2\pi *19.6*39.2=7241.25 mm squared

The answer is about 7241.25 mm squared.

AleksAgata [21]3 years ago
4 0

Answer:

surface area: 7241.25

Step-by-step explanation:

using this formula for surface area of cyclinder: 2πrh+2πr^2

diameter = 2r --> 39.2 = 2r

so r= 19.6

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jek_recluse [69]

Answer:

2t^3+15t^2+19t+6

Step-by-step explanation:

Height of the Rectangle=t^2+7t+6

Width of the Rectangle=2t+1

Area of the Rectangle = Height X Width

=(2t+1)(t^2+7t+6)\\=2t(t^2+7t+6)+1(t^2+7t+6)\\=2t^3+14t^2+12t+t^2+7t+6\\$Collect like terms\\=2t^3+14t^2+t^2+12t+7t+6\\Area=2t^3+15t^2+19t+6\\

The area of the rectangle is 2t^3+15t^2+19t+6

4 0
3 years ago
The scale on a map is 1 inch =2 1/2 miles.the distance between two streets on the map is 1 3/4 inches what is the actual distanc
DanielleElmas [232]

Answer:

4 3/8 miles

Step-by-step explanation:

We are told that: the scale on a map is 1 inch =2 1/2 miles.the distance between two streets on the map is 1 3/4 inches

If 1 inches = 2 1/2 miles

1 3/4 inches =

Cross Multiply

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= 7/4 × 5/2

= 35/8

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7 0
3 years ago
A test is worth 50 points. Multiple- choice questions are worth 1 point, and short answer questions are worth 3 points. if the t
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15 Short Answer Questions
( =45 points)

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4 0
3 years ago
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Simplify the expression<br> -9(-6+2n)
Wittaler [7]
54 - 18n

Multiply -9 by -6 to get 54.
Multiply -9 by 2n to get 18n.
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Please help me with this problem and if you can show your work​
ella [17]

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2.9

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