2. Find the number of ways three toppings could be chosen for a hamburger from a menu of 10 toppings.

How is this equation completed? i cannot find any examples in the book.

Me with these questions , i don’t understand scientific notation!

14. a family spends 1⁄10 of its annual income for housing, 1⁄4 for food and clothing, 1⁄5 for general expenses, and 2⁄15 for entertainment. what fractional part of their income is spent on these items altogether? a. 11⁄12 b. 41⁄60 c. 6⁄41 d. 1⁄7