Choose the following ratios as a decimal: 21 out of 40 mountain bikes .4
.525
4.21
21.4
.21

Choose the following ratios as a percent: 21 out of 40 mountain bikes
40%
21%
52.5%
52%

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

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