For any single draw,
![\mathbb P(\text{white})=\dfrac6{42+6+8}=\dfrac6{56}](https://tex.z-dn.net/?f=%5Cmathbb%20P%28%5Ctext%7Bwhite%7D%29%3D%5Cdfrac6%7B42%2B6%2B8%7D%3D%5Cdfrac6%7B56%7D)
![\mathbb P(\text{gray})=\dfrac8{42+6+8}=\dfrac8{56}](https://tex.z-dn.net/?f=%5Cmathbb%20P%28%5Ctext%7Bgray%7D%29%3D%5Cdfrac8%7B42%2B6%2B8%7D%3D%5Cdfrac8%7B56%7D)
Drawing a white marble or a gray marble are disjoint events; only one of them can happen. So
![\mathbb P(\text{white or gray})=\mathbb P(\text{white})+\mathbb P(\text{gray})-\underbrace{\mathbb P(\text{white and gray})}_0](https://tex.z-dn.net/?f=%5Cmathbb%20P%28%5Ctext%7Bwhite%20or%20gray%7D%29%3D%5Cmathbb%20P%28%5Ctext%7Bwhite%7D%29%2B%5Cmathbb%20P%28%5Ctext%7Bgray%7D%29-%5Cunderbrace%7B%5Cmathbb%20P%28%5Ctext%7Bwhite%20and%20gray%7D%29%7D_0)
![\mathbb P(\text{white or gray})=\dfrac6{56}+\dfrac8{56}=\dfrac{14}{56}](https://tex.z-dn.net/?f=%5Cmathbb%20P%28%5Ctext%7Bwhite%20or%20gray%7D%29%3D%5Cdfrac6%7B56%7D%2B%5Cdfrac8%7B56%7D%3D%5Cdfrac%7B14%7D%7B56%7D)
Out of 224 draws, you should expect
![\dfrac{14}{56}\times224=56](https://tex.z-dn.net/?f=%5Cdfrac%7B14%7D%7B56%7D%5Ctimes224%3D56)
of the marbles to be either white or gray.
I would say 32 <span>• 3/4 or 32* 3/4
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You're looking for the volume of the prism. The dead giveaway there is that you're looking for "cubic" measurement. Cubic measures are indicators that the volume is being determined, just like "square feet" or inches, etc indicates area is being determined. The volume for this prism is found by multiplying the length times the width times the height. In decimal form, 45×30×40=54,000. But that is in cubic inches and we want cubic feet. So we will use dimensional analysis to convert that. Setting up the DA looks like this, keeping in mind that there are 12 cubic inches in 1 cubic foot:
![54,000in^3* \frac{1ft*1ft*1ft}{12in*12in*12in}](https://tex.z-dn.net/?f=54%2C000in%5E3%2A%20%5Cfrac%7B1ft%2A1ft%2A1ft%7D%7B12in%2A12in%2A12in%7D%20)
. The label of cubic inches cancels out leaving us with cubic feet, and doing the division there gives us 54,000/(12*12*12) which is 31.25 cubic feet.
5 is the answer
I used my phone