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3 years ago

a cylinder has a base diameter of 16 inches and a height of 7 inches. What is its volume in cubic inches

Mathematics

1 answer:

lilavasa [31]3 years ago

6 0

Answer:

224

Step-by-step explanation:

i think you would do 16 X 2 and then times that by 7 which would give the answer as 224

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I think i got the answer but a second opinion would be greatly appreciated!

AlexFokin [52]

Answer:

Your answer would be B: 30 ft squared

Step-by-step explanation:

Find the area of the circle: 5.5 (radius) multiply it by itself then multiply that by 3.14 which gets you 94.985. Now find the area of the square which is 8*8 = 64. Subtract 64 from 94.985 and your answer will be 30.985. The questions asks for the approximate (estimate), so the closest one would be 30 ft squared

4 0

3 years ago

Veronica works at a music store last week she sold five more than three times the number of headphones that she sold this week.

svet-max [94.6K]

Answer:

14 headphones

Step-by-step explanation:

Use algebraic manipulation. Let x be the number of headphones sold this week:

89 = x + (3x + 5)

Combine like terms:

89 = 4x + 5

Get the x's on one side:

84 = 6x

Divide:

14 = x

So, Veronica sold 14 headphones this week.

5 0

2 years ago

A thermometer is taken from an inside room to the outside, where the air temperature is 20° f. after 1 minute the thermometer re

fomenos

The change in the temperature is proportional to the difference in temperatures. Let's call the initial temperature of the room and the thermometer $E_0$ and the current temperature $E(t)$ where $t$ is the elapsed time in minutes. The outside temperature is 20 F.

Newton's Law of Cooling:

$E(t) - 20 = (E_0 - 20) e^{- k t}$

We're given $E(1)=70 \textrm{ and } E(5)=45$

$70-20 = (E_0 - 20) e^{-k}$

$45-20 =(E_0 - 20) e^{-5k}$

Dividing,

$\dfrac{50}{25}=e^{4k}$

$k = \dfrac 1 4 \ln 2$

Now,

$E(t) - 20 = (E_0 - 20) e^{- k t}$

$E_0 = 20 + (E(t) - 20)e^{k t}$

$E_0 = 20 + (E(1) - 20)e^{k}$

$E_0 = 20 + (70 - 20)e^{\ln 2/4}$

$E_0 = 20 + 50 \cdot 2^{1/4} \approx 79.46 \textrm{ degrees F}$

3 0

4 years ago

14 is 28% of what number

Sindrei [870]

'is' in mathematics means the equal sign
'of' in mathematics means the multiplication sign
the number can be any variable you chose it to be

$14 = \frac{28}{100} \times x$

Divide both sides by 28

$\frac{1}{2} = \frac{x}{100}$

Multiply by 100 on both sides to isolate 'x'

$\boxed{\bf{x=50}}$

14 is 28% of 200

8 0

3 years ago

Read 2 more answers

How do I solve this?

Daniel [21]

5x+17 = 8x-31
48 = 3x

x = 48/3

x = 16

RS = 5x + 17 = 5*16 +17 = 80 +17 = 97

RS = 97

hope helped

6 0

3 years ago