Word problems test both your math skills and your reading comprehension skills.
In order to answer them correctly, you'll need to examine the questions carefully.
We don't see it, but there's a 1 there, times 100.
In the second hour, 0.965 to the second power, times 100. This is now 2 years after 1999, and you're going to grow 8% from this number. The answer to our question will be 200 times 1.08 to the eighth power.
So over 8 years, you see that the compounding growth by 8% actually ends up being quite dramatic.
Behold Photo Math, a new free photo calculator app that solves math equations in a snap -- a snap of your smartphone’s camera. However, in this case, the question requires that you calculate another answer first: the number of questions Abel got right.You'll need to subtract 4 from 80, then calculate the percentage of the difference: The standard approach would be to multiply 200 by 0.92: 200*.92=184.And then we'll try to come up with a formula for, in general, how much is left after n hours. So in hour 1, we're going to have 96.5% of hour 0, or 0.965 times 100, times hour 0. Well, we're going to have 96.5% of the previous hour.So let's say hours that have passed by, and percentage left. Well, it hasn't decayed yet, so we have 100% left. We will have lost 3.5%, which means that we have 96.5% of the previous hour.Let's do a couple of word problems dealing with exponential growth and decay.So this first problem, suppose a radioactive substance decays at a rate of 3.5% per hour.So it'll be 0.965 times this, times 0.965 times 100. So in the first hour, we have 0.965 to the first power, times 100.In the zeroth hour, we have 0.965 to the zeroth power.So his normal pay of 40 × = 0, plus his overtime pay of 12 × = 0 gives us a total of 0 There are 12 girls!And 3b = 4g, so b = 4g/3 = 4 × 12 / 3 = 16, so there are 16 boys So there are now 12 girls and 16 boys in the class, making 28 students altogether.