You have 5 out of the total of 100 raffle tickets sold so you have a (\( \frac{5}{100} \)) x 100 = \( \frac{5 \times 100}{100} \) = \( \frac{500}{100} \) = 5% chance to win the raffle.

A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.

The ratio of football cards to baseball cards is 7:2 and the ratio of baseball cards to basketball cards is 7:1. To solve this problem, we need the baseball card side of each ratio to be equal so we need to rewrite the ratios in terms of a common number of baseball cards. (Think of this like finding the common denominator when adding fractions.) The ratio of football to baseball cards can also be written as 49:14 and the ratio of baseball cards to basketball cards as 14:2. So, the ratio of football cards to basketball cards is football:baseball, baseball:basketball or 49:14, 14:2 which reduces to 49:2.

There are 3 4-passenger taxis available so that's 3 x 4 = 12 total seats. There are 17 people needing transportation leaving 17 - 12 = 5 who will have to find other transportation.

By buying two shirts, Bob will save $42 x \( \frac{40}{100} \) = \( \frac{$42 x 40}{100} \) = \( \frac{$1680}{100} \) = $16.80 on the second shirt.

So, his total cost will be
$42.00 + ($42.00 - $16.80)
$42.00 + $25.20
$67.20