Mr james has cylindeical brakes measure 4 inches in diameter and are 9 inches high what is the value contain within the brakes

Mathematics

1 answer:

ra1l [238]3 years ago

8 0

Answer:I think you have to multiply them

Step-by-step explanation:

So 4 times 9= 36

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A rock is thrown up from the ground at a velocity of 84 feet per second. The formula h = -16t2 + 84t gives the rock's height in

kenny6666 [7]

Answer:

h = 110.24 m

Step-by-step explanation:

It is given that,

A rock is thrown up from the ground at a velocity of 84 feet per second. The formula $h = -16t^2 + 84t$ gives the rock's height in feet after t second.

We need to find the maximum height of the rock. For maximum height put $\dfrac{dh}{dt}=0$

So,

$\dfrac{d( -16t^2 + 84t)}{dt}=0\\\\-32t+84=0\\\\t=\dfrac{84}{32}\\\\t=2.62\ s$

Put t = 2.62 s in the equation of height. So,

$h = -16(2.62)^2 + 84(2.62)\\\\h=110.24\ m$

So, the maximum height of the rock is 110.24 m.

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3 years ago

Solve the system using substitution. Show work.<br><br> {4x+5y=7<br> {y=3x+9

hichkok12 [17]

$\it \begin{cases}\it4x+5y=7
\\\;\\ \it y=3x+9 \ \ \ \ (*) \end{cases}$

$\it 4x+5y=7 \stackrel{(*)}{\Longrightarrow} 4x+5(3x+9) = 7 \Rightarrow 4x+15x+ 45 =7 \Rightarrow 
\\\;\\
\Rightarrow 4x+15x=7-45 \Rightarrow 19x= -38 \Rightarrow x = \dfrac{-38}{19} \Rightarrow x= -2$

$\it x=-2 \stackrel{(*)}{\Longrightarrow} y=3\cdot(-2) +9 \Rightarrow y=-6+9 \Rightarrow y=3
\\\;\\
So,\ we\ have: \begin{cases} \it x=-2
\\\;\\
\it y=3\end{cases}$

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4 years ago

How is 1.479 a rational number

Firlakuza [10]

Step-by-step explanation:

because it has decimal number.

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3 years ago

Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage r

ioda

Answer:

Decay function, 70% per year.