Answer:
C. about 25 years.
Step-by-step explanation:
We have been given that two Jackie takes off on a round-trip to Vega, 25 light-years away. She travels at an average speed close to the speed of light, say, 0.9999c.
To find time it will take Jakie to reach Vega, we will divide the distance of Vega by Gwen's speed.
Therefore, it will take approximately 25 years for Jakie to reach Vega and option C is the correct choice.
Answer:
There are 160 possible 4-piece lunch special meal.
Step-by-step explanation:
The lunch menu has a 4-piece lunch special which consists of a sandwich, soup, dessert and drink.
The available options for the sandwiches, soups, desserts and drinks are:
Sandwich: chicken, cheese and tomato, tuna, ham and lettuce, turkey
Soup: tomato, chicken noodle, vegetable
Dessert: ice-cream, piece of cake
Drink: tea, coffee, Coke, Sprite
So, the number of options are:
n (Sandwich) = n (A) = 5
n (Soup) = n (B) = 4
n (Dessert) = n (C) = 2
n (Drink) = n (D) = 4
There are 5 ways to select a sandwich, 4 ways to select a soup, 2 ways to select a dessert and 4 ways to select a drink.
The total number of possible 4-piece lunch special is:
Total number of 4-piece lunch special = n (A) × n (B) × n (C) × n (D)
Thus, there are 160 possible 4-piece lunch special meal.