. (a) If a and bare two vectors such that 3i+2j +9k and b = i + aj + 3k. Find the value of a so that a+b is perpendicular to a-b.

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

Beth divided 9 ounces of her granola recipe into 4 equal-sized amounts. she placed the amounts into individual bowls. the fraction 9/4 represents the number of ounces of granola in each bowl. which other number represents the amount of granola beth has in each bowl? (a) 1 1/4 (b) 2 1/4 (c) 1 3/4 (d) 3 3/4 i need !

[tex]5 \times1 \frac{12}{13} [/tex] me