Answer: 1:1
Step-by-step explanation:
Let r be the radius and h be the height of a cylinder.
Formula: Curved surface area of cylinder =
Now, if radius of a cylinder is doubled and its height is halved, then new radius will be R= 2r and new height will be
Now, new surface area =
Ratio of curved surface areas :
Hence, the ratios of their surface areas = 1:1 .
these are the answers to all systems
Answer:
The question seems not to be complete, below is a possible complete question:
Kristin earns $6.50 for every hour she babysits for the Overstreet family. Part A: Last Friday, Kristin babysat for 4.5 hours. How much money did she make during that job? $__________ Part B: Mrs. Overstreet has told Kristin that she will pay her $45.50 for tomorrow's babysitting job. How many hours will Kristin babysit then? __________ hours
Answers:
Part A: She makes $29.25
Part B: She babysat for 7 hours
Step-by-step explanation:
Part A:
amount earned per hour = $6.50
Number of hours worked = 4.5 hours
1 hour = $6.50
∴ 4.5 hours = 6.50 × 4.5 = $29.25
part B:
total amount to be earned = $45.50
earning rate = $6.50 per hour