Khan Academy Problem Solving

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So capacity is going to be equal to 138 divided by 0.82, right? So it's going to be this number-- this is total capacity-- minus what they were prior to the storm, 124. I don't know if they allow you to use a calculator, but I think we can do this on our own. And we could take this decimal point two over, so we can move this decimal point two to the right.

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If you're seeing this message, it means we're having trouble loading external resources on our website. And you might have a temptation to just invert both sides, but you can't do that just yet. And then 1/16, that's the same thing as 1/2 to the third power is 1/8, so it's to the fourth power. And then this is-- we'll just use what we know about exponent rules, and we've proven this in other Khan Academy videos. You can just multiply these exponents, so that's equal to 1/2 to the minus 4. They want to know how many red beads were removed, right? So all the beads, you multiply them together and you get 147,000.

If you're behind a web filter, please make sure that the domains *.and *.are unblocked. Because if you took the inverse of this, it's not like you just get x minus x plus 1. And then 1/2 to the 4 to the minus 1, you multiply them and that's equal to minus 4. So we've essentially factored out all the 7's that we can fit into 147,000.