A hot-air balloon rises 180 feet every 9 seconds. Which equation represents the relationship between time and height? O A. y = 180x B. y = 9x + 180 o c. y = 90% ( D. y = 20x​

y = 20x

Step-by-step explanation:

Using the process of elimination, it definitely cannot be A. B was in consideration until realising that the height is proportional to time therefore B was incorrect. C was also wrong as 180/9 = 20 not 90 leaving D as the correct option.

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!