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3 years ago

Help plz...............

Mathematics

1 answer:

Charra [1.4K]3 years ago

3 0

Step-by-step explanation:

2πr

2x 3.14 x 8.1 = 50.22in

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The length of a rectangle is twice the width. the perimeter is 32 cm more than the width. find the dimensions of the rectangle.

SCORPION-xisa [38]

Width: x
Length: 2x
Perimeter=2x+2x+x+x=6x
32 cm more than width means x+32
6x=x+32
5x=32
x=6.4
Dimension is 6.4×12.8 (width×length)

7 0

3 years ago

Three decided by 2 equals

Nonamiya [84]

Answer:

1.5 is the answer when 3 is divided by 2

Step-by-step explanation:

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3 years ago

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Can someone help??? thanks

velikii [3]

The answer to your question is 4(d+3)

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2 years ago

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I don’t understand it

Serga [27]

the balloon starts at 158 thats our set number

then it goes up 56 feet a minute, you add that to your height

after that you have the variables h and t you would write it as

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3 years ago

(b) The globe has a radius of 28.5 cm. Find the surface area of the globe. Round your answer to two decimal places. Use:

damaskus [11]

Answer:

$\boxed {\boxed {\sf 10,207.03 \ cm^2}}$

Step-by-step explanation:

Surface area is the total area of the surface of an object. A globe is a sphere and the formula for calculating a sphere's surface area is:

$SA= 4 \pi r^2$

The radius (r) of the globe is 28.5 centimeters. Substitute this value into the formula.

r= 28.5 cm

$SA= 4 \pi ( 28.5 \ cm)^2$

Solve the exponent. Multiply the number by itself.

(28.5 cm)²= 28.5 cm * 28.5 cm = 812.25 cm²

$SA= 4 \pi (812.25 \ cm^2)$

Multiply 4, pi and 812.25 centimeters together.

$SA= 12.56637061 (812.25 \ cm^2)$

$SA= 10207.03453 \ cm^2$

Round to two decimal place or the hundredth place. The 4 in the thousandth place to the right (10207.03453) tells us to leave the 3 in the hundredth place (10207.0<u>3</u>453).

$SA \approx 10207.03 \ cm^2$

The surface area of the globe is approximately <u>10,207.03 centimeters squared.</u>

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2 years ago

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