4 years ago

Given the cylinder enter the radius, enter diameter, enter the height than

Mathematics

1 answer:

Anna [14]4 years ago

6 0

The diameter is 10 so it would be pi•radius squared 3.14•52sq or 3.14•10•2=78.54 the base of the circle is 78.54

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The sales tax in one town is 8%. So, the total cost of an item can be written as c + 0.08c. What is the total cost of an item th

frutty [35]

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12.96

Step-by-step explanation:

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3 years ago

2k - 3(4 - k) = 3k + 4<br> whats k?

neonofarm [45]

They got it wrong it is actually k=8

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3 years ago

What’s the area of the kite? 20 points! <33

Margarita [4]

1200cm

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3 years ago

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How many grams of apples does it show?

Alborosie

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3 years ago

BRAINLIEST GURANTEED

Amiraneli [1.4K]

Given:

The function is

$h=3+25t-5t^2$

To find:

The values of t where h is 8 meters.

Solution:

We have,

$h=3+25t-5t^2$

Putting h=8, we get

$8=3+25t-5t^2$

$0=3+25t-5t^2-8$

$0=-5+25t-5t^2$

$0=-5(1-5t+t^2)$

Dividing both sides by -5 and interchanging the sides, we get

$1-5t+t^2=0$

$t^2-5t+1=0$

Here, $a=1,b=-5,c=1$ .

Using quadratic formula, we get

$t=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

$t=\dfrac{-(-5)\pm \sqrt{(-5)^2-4(1)(1)}}{2(1)}$

$t=\dfrac{5\pm \sqrt{25-4}}{2}$

$t=\dfrac{5\pm \sqrt{21}}{2}$

It can be written as

$t=\dfrac{5-\sqrt{21}}{2}$ and $t=\dfrac{5+\sqrt{21}}{2}$

$t=0.20871215$ and $t=4.7912878$

$t\approx 0.21$ and $t\approx 4.79$

Therefore, the required values of t are 0.21 and 4.79.

4 0

3 years ago