Answer:
$270.2576
Explanation:
Given:
Items to be purchased by Sara:
keyboard, $9.99
mouse, $14.99
22-inch monitor, $99.99
chair, $129.99
Sales tax = 6%
To find: total amount after applying sales tax
Solution:
Total amount before applying sales tax = 
Amount of sales tax =
= $15.2976
Total amount after applying sales tax
So,
total of her purchase after applying sales tax = 
Sara has
> $270.2576 with her, so she can easily buy the products.
1. dependent: mice’s weight. independent: amount of amino acid
2. dependent: plant’s height. independent: color of lights
3. dependent: amount of ammonia released.
independent: type of fish food
4. dependent: plant height. independent: temperature of water
5. dependent: tadpole’s development
independent: protein supplement or not