Answer:
23.99
Step-by-step explanation:
Given:
a.) The price of an item has dropped to $63 today.
b.) Yesterday it was $140.
For us to be able to determine the percentage decrease, we will be using the following formula:

We get,
Original Price = $140
Present Price = $63





Therefore, the decrease of the price in percentage is 55%.
Answer: y= 16.97 ×=7.27
Step-by-step explanation:
Click on file for workings
Answer: Option c.
Step-by-step explanation:
To find surface area, add two area of circle and curved surface area.
Curved surface area formula = 2*π*r*h, where r = radius, h = height.
So total surface area will be,
2π*r ^ 2 + 2*π*r*h
Remember that radius(r) = 4 because diameter is given in figure.